Quality Surveillance of Pediatric Oral Liquids: Analytical Perspectives on Adulterant Detection

Abstract

There is a high adoption of pediatric oral liquid formulations, including syrups, suspensions and solutions, due to their ease of dispersion and flexibility in their dosage in children. Nevertheless, these formulations are very susceptible to quality, contamination and deliberate or inadvertent adulteration. The chemical contents of toxic substances like diethylene glycol, ethylene glycol, heavy metals, synthetic dyes, and unapproved excipients in children medicines have raised significant health issues of concern in the entire world and have been implicated in the cases of poisoning and deaths in children. Thus, effective quality monitoring and quality analytical methods are needed to verify the safety and efficacy of pediatric oral liquid drugs. The current review is dedicated to analytical perspective, which is being considered in detecting adulterants in pediatric oral liquids. Some of the modern and traditional methods of analysis such as high performance liquid chromatography, liquid chromatography-mass spectrometry, gas chromatography, high-performance thin-layer chromatography, Raman spectroscopy, nuclear magnetic resonance spectroscopy and electrochemical sensor are discussed in the identification and quantification of contaminants and adulterants. The contribution of regulatory monitoring and quality surveillance plans suggested by the organization like the World Health Organization, and the US Food and Drug Administration, in the control of contamination in pediatric medicines is also brought out in the review. Moreover, the latest developments in fast screening instruments, nanosensors, chemometrical methods, and portable detection methods to analyze the field level are summarized. The imperative in the strong analytical procedures, strict regulatory procedures and ongoing post-marketing surveillance is stressed to avert adulteration and in order to assure the safety of pediatric liquid dosage forms. In general, this review offers a concise summary of existing analysis strategies and new technologies that can be used to ensure the high-quality control of oral liquid preparations of children.

Keywords

Oral liquid formulations for children, Quality control, Adulterants, Diethylene glycol poisoning, Methodology, HPLC, Pharmaceutical adulteration, Pharmaceutical monitoring, Substandard counterfeit children medicine.

Introduction

To guarantee quality and safety of pediatric oral liquid medications, it is necessary to provide effective preventive measures across the pharmaceutical manufacturing and supplying structure. Prevention strategies are critical to reduce the risk of contamination and adulteration as well as existence of toxic impurities in pediatric formulations. Strict screening, and quality testing of raw materials and excipients prior to their use in the manufacture of pharmaceuticals has been identified as one of the most critical. Glycerin, propylene glycol, and sorbitol should also be selectively filtered on the occurrence of toxic contaminants like Diethylene Glycol, Ethylene Glycol that have been the cause of a number of cases of poisoning attributed to the syrup being used on children in the past.

Another important preventive measure that is implemented to ensure the quality of the orally administered liquid in pediatrics is Good Manufacturing Practices (GMP). The correct documentation, proven manufacturing processes, equipment, qualifications, and frequent quality control testing will assist in the maintenance of safe production of pharmaceutical products. It is also important to have risk based quality management systems and strict supplier qualification processes which ensure that no adulterated or substandard materials get into the manufacturing process.

Regulatory surveillance and global standards are significant in averting adulteration in children drugs. To further enhance quality surveillance systems, organizations like the World Health Organization, the U.S. Food and Drug Administration have raised safety warnings and regulatory measures. The guidelines include a focus on high-risk excipients that should be mandated to undergo testing, there should be enhanced pharmacovigilance systems and post-marketing surveillance that should be effective in order to identify cases of contamination at an early stage.

State of the art methods of analysis are also vital during preventive quality control strategies. The sensitive tests can be done using modern analytical tools like High-Performance Liquid Chromatography, Gas Chromatography and Liquid Chromatography-Mass Spectrometry.

Detection of poisonous adulterants and impurities in pharmaceutical preparations. Regular screening of raw materials and intermediates and final products by analytical methods will aid in regulation of quality standards as per the regulatory laws and reduce chances of contamination of pediatric liquid medicines.

Besides the traditional methods of analysis, the emergence of fast screening technologies like the spectroscopic methods, nanosensors and portable detection devices has greatly enhanced the efficiency of surveillance of pharmaceutical quality. Such technologies can quickly and inexpensively detect adulterants during the production phase and at control points, which reinforced precautionary monitoring measures on pediatric drugs.

Besides, pharmaceutical manufacturers, regulatory bodies, healthcare practitioners, and pharmacists should be aware to avoid the supply of contaminated or adulterated pediatric drugs. The risk of pharmaceutical adulteration and the increased safety of drugs within the pediatric healthcare systems can be greatly minimized through training programs, tighter enforcement of the regulations, and enhanced monitoring of the supply chain.

3. REGULATORY GUIDELINES

The regulatory authorities are very important in the safety, quality, and effectiveness of the pediatric medicines. Liquid formulations are at a higher risk of contamination and adulteration, which leads to the formulation of tight regulatory principles that observe the production of oral liquid medicines that are used in pediatrics, their quality control, and the delivery process. These regulations focus on the adoption of quality assurance measures, risk management, and regulation control to avert the occurrence of dangerous contaminants in drug products.

Various recommendations have been given by international bodies like the world health organization and U.S food and drug administration in order to enhance quality surveillance of pharmaceuticals. Such agencies demand that pharmaceutical manufacturers adhere to strict regulation systems, such as Good Manufacturing Practices (GMP), and appropriate.

Record keeping, tested analysis procedures and rigorous quality tests on raw materials and finished products. These regulatory measures can be used to make sure that oral liquid pediatric formulations have achieved the required safety and quality standards before they are found in the market.

Contamination of pharmaceutical excipients with toxic substances like Diethylene Glycol and Ethylene Glycol is one of the greatest regulatory issues in pediatric medicines. To curb this problem, government bodies have come up with compulsory testing on excipients at high risk such as glycerin, propylene glycol, and sorbitol. These excipients are subject to rigorous analytical testing prior to their application in pharmaceutical preparations to make sure that toxic impurities do not exist in excess of the limits accepted.

Pharmacopeial bodies like the United States Pharmacopeia, and international pharmacopeias have also been able to provide official standards of the quality assessment of pharmaceutical ingredients and finished dosage forms. These standards entail the verified analytical methods of impurity identification, tolerable thresholds of contaminants, and standard directions regarding the regular quality control testing. Pharmacopeial standards must be adhered to in order to ensure the safety and efficacy of the pediatric oral liquid medicines.

Regulatory tools are also necessary to monitor the safety of medicines when released to the market; the monitoring is done by post-marketing surveillance and pharmacovigilance systems. The regulatory bodies constantly review the adverse drug reports, quality complaints, and safety alerts of pharmaceutical products. To protect the health of people, the regulatory authorities may recall the products, issue warnings, or conduct an inspection of the manufacturing process in the event of contamination or other quality issues.

Moreover, harmonization efforts by international bodies like the International Council on Harmonisation of Technical Requirements of Pharmaceuticals to Human use are also in a bid to harmonize pharmaceutical requirements in various countries. Coordinated guidelines are effective in maintaining the same level of quality, enhancing cooperation in regulations, and advancing international quality surveillance of pharmaceuticals.

Generally, regulatory regulations and international standards of quality are critical in avoiding adulteration and safety of pediatric oral liquid preparations. Pharmaceutical products need to be kept in a proper regulatory adherence, periodic inspections, verified analytical procedures, and constant observation to ensure the integrity of the pharmaceutical products and to protect the health of pediatric patients throughout the world.

4. CHALLENGES AND LIMITATIONS :

Although there have been great improvements in the area of pharmaceutical quality monitoring, there are still a number of challenges and limitations on the guaranteeing of the safety of pediatric oral liquids. The complexity of liquid dosage forms that have several excipients including sweeteners, preservatives, solvents and flavoring agents is one of the biggest challenges. Most formulation constituents can complicate the detection detection process of the analytical process and can intervene with the identification of contaminants or adulterants during quality testing.

The other weakness is the detection of the toxic impurities that are contained in very low levels. Deglomeratives like Diethylene Glycol and Ethylene Glycol can be present in minimal traces but very dangerous to health especially among the pediatric patients. The trace-level contaminants are very sensitive and their detection necessitates very sensitive methods of analysis which are not always present in the normal pharmaceutical quality control laboratories.

Advanced analytical methods are costly and difficult to execute, which is also a major limitation to the pharmaceutical quality surveillance system. High-Performance Liquid Chromatography, Gas Chromatography, and Liquid Chromatography Mass Spectrometry are costly in terms of instrumentation, specialized maintenance and highly trained analysts. These needs may limit the extent of their usage, especially where resources are limited and in developing nations.

The other challenge is the lack of rapid and portable capabilities in the quality of detention of pharmaceuticals on-site because of the lack of such technology. The majority of the analytical techniques are laboratory-oriented and presuppose sample preparation, controlled conditions of the experiment, and special equipment. Consequently, it makes it challenging to monitor pharmaceutical products in the supply chain in real time and this can slow in the detection of contaminated/ adulterated medicines. 

The quality surveillance limitations are also associated with regulatory challenges and supply chain challenges. In certain areas, poor regulatory implementation, lack of proper inspection mechanism, and ineffective quality control provisions can lead to entry of poor quality of medicines or adulterated medicines into the market. Also, sophisticated international pharmaceutical supply chains incorporating various manufacturers, distributors and suppliers augment chances of contamination and diminishes traceability of pharmaceutical ingredients.

Moreover, the absence of unified global standards of analytical laboratory procedures and unequal regulations practices in the various countries may pose challenges in ensuring that there is consistency in pharmaceutical quality control mechanisms. Regulatory discrepancy, testing standards, and surveillance options can possibly reduce the success of transnational measures to prevent pharmaceutical contamination and guarantee the safety of oral liquid drugs in children. 

5. FUTURE PERSPECTIVES

The continuous improvement of the pharmaceutical quality surveillance and analysis technologies will be needed to ensure the safety and quality of the pediatric oral liquid formulations. The way forward should be put on enhancing the regulatory measures, enhancing the analytical skills, and application of new detection methods to avoid contamination and adulteration of child drugs. It is expected that the international regulatory bodies like the World Health Organization and the U.S. Food and Drug Administration will have a major role in establishing more stringent standards and uniform regulatory policies in the area of pharmaceutical quality surveillance in various countries.

Innovation of sophisticated analysis methods will keep improving the process of pharmaceutical adulterants and contaminants detection. The technological advancements are likely to make modern analytical techniques sensitive, faster and less expensive like the High-Performance Liquid Chromatography, Gas Chromatography, Liquid Chromatography- Mass Spectrometry, and Nuclear Magnetic Resonance Spectroscopy. The innovations will help monitor pediatric oral liquid medicines impurities and adulterants easier.

Along with the traditional methods of laboratory-based, newer technologies like spectroscopy-based techniques, electrochemical sensors, nanosensors, and portable analytical instruments will likely have a major role in the future pharmaceutical quality surveillance systems. These technologies offer quick, non-destructive and field applicant technologies to identify contaminants and adulterants in pharmaceutical products. These innovative tools can dramatically improve real time monitoring of the use of pediatric medicines in the manufacturing, distribution, and regulation inspection processes.

The other potential developmental area is the use of chemometric analysis, artificial intelligence, and machine learning methods in a pharmaceutical assessment of quality. Such computational tools may help to analyze analytical data of complex nature, to discover patterns of contamination, to make the predictions about the possible risks of pharmaceutical adulteration. This kind of highly data-driven stands to enhance effectiveness and dependability of the pharmaceutical quality control system in the future.

Enhancing the quality surveillance methods of the future will also be significantly based on strengthening transparency and traceability of pharmaceutical supply chains. To stop the introduction of low quality or adulterated products into the pharmaceutical industry, the introduction of digital technologies, electronic tracking, and blockchain-based monitoring of the supply chain could assist. The verification of suppliers and the quality audit of the excipient manufacturers also should be improved and stricter to reduce chances to contaminate the pediatric liquid formulations.

Moreover, more international cooperation between regulatory bodies, pharmaceutical corporations, medical practitioners, and prospective institutions in research would be necessary in countering new issues of pediatric medicine safety. Information sharing, quick safety notifications, and coordinated regulatory responses could be accomplished through international cooperation to prevent contamination incidents and safeguard the health of the population . The pharmaceutical analytical science research and the constant innovation will be crucial to enhance the quality control of the pediatric oral liquid medicines. The implementation of higher standards of analytical techniques, better regulatory surveillance systems and novel detection technologies will play a significant role in enhancing the quality control systems of pharmaceuticals and the safety and reliability of pediatric medicines in the long run in the entire world.

CONCLUSION

SKU Pediatric oral liquid formulations are significant in pediatrics health care since they offer convenience in administration, flexible dosing, and enhanced patient adherence to children. Nevertheless, the formulations are very susceptible to contamination, adulteration, and other quality related problems because of the availability of various excipients and complicated manufacturing procedures. The presence of toxic substances like Diethylene Glycol and Ethylene Glycol in child medicines has made it clear that there is an imperative to curb the quality of pharmaceuticals and rigid control to establish proper quality of medicines.

Analytical science is an essential step in determining and quantitative adulterants/ contaminants in oral liquid preparations of pediatric formulations. State-of-the-art analytical methods like High-Performance Liquid Chromatography, Gas chromatography, Liquid chromatography-Mass spectrometry and Nuclear magnetic Resonance Spectroscopy.

Deliver very sensitive and dependable devices that are used in the identification of impurities and poisonous adulterants in medication items. The use of these analytical techniques helps in ensuring the safety, quality and efficacy of pediatronic drugs.

International regulatory bodies and the world health organization and the U.S food and drug administration are very critical in setting the quality standards and overseeing pharmaceutical products in terms of regulation guidelines and post-marketing surveillance programs. The strategies that can help in preventing the adulteration of pharmaceuticals are the implementation of good manufacturing Practices, strictness in testing of raw materials, supplier qualification and continuous quality monitoring.

Regardless of the strong development of analytical technologies and regulatory control systems, various international issues may still be highlighted, such as the sophisticated pharmaceutical distribution networks, the lack of analytical potential in the developing world, and the growing number of inappropriate and fake medicines. The challenges can be dealt with by enhancing the international cooperation, strengthening regulatory practices, and making consistent progress in the pharmaceutical analysis technologies.

To sum up, quality monitoring of pediatric oral liquid medicines is necessary to ensure the safety of the pediatric patients and the quality of pharmaceutical products. The adoption of novel analytical methods, stringent regulatory measures, better supply chain management, and novel detection facilities will help a lot in the prevention and detection of adulterant in pediatric medicines. The ongoing research, the collaboration with the regulations, and the inventions of technologies will be essential to enhance the pharmaceutical quality monitoring framework and protect the well-being of children on the international level.

ACKNOWLEDGMENT :

The author would like to express sincere gratitude to Dr. Vijay Jadhav, Associate Professor at Rashtrasant Janardhan Swami College of Pharmacy, for his valuable guidance, continuous support, and encouragement during the preparation of this review article. His academic expertise and constructive suggestions greatly contributed to the successful completion of this work.

The author also wishes to thank the management and faculty members of Rashtrasant Janardhan Swami College of Pharmacy, Tal-Kopargaon, Dist. Ahilyanagar, Maharashtra, for providing the necessary academic environment, facilities, and resources for conducting this study.

Finally, the author expresses sincere appreciation to colleagues and well-wishers for their motivation and support throughout the preparation of this review article entitled “Quality Surveillance of Pediatric Oral Liquids: Analytical Perspectives on Adulterant”.

ABBREVIATIONS

API	Active Pharmaceutical Ingredient
DEG	Diethylene Glycol
EG	Ethylene Glycol
HPLC	High-Performance Liquid Chromatography
LC-MS	Liquid Chromatography–Mass Spectrometry
GC	Gas Chromatography
HPTLC	High-Performance Thin Layer Chromatography
NMR	Nuclear Magnetic Resonance Spectroscopy
FTIR	Fourier Transform Infrared Spectroscopy
WHO	World Health Organization
FDA	U.S. Food and Drug Administration
USP	United States Pharmacopeia
ICH	International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use
QC	Quality Control

REFERENCES

1. Bharwani, H., Kapur, S. and Palani, S.G., 2025. Development of a novel and affordable point-of-care kit for rapid detection of urea and glucose adulteration in cow milk. Analytical Methods, 17(10), pp. 1265-1280. https://doi.org/10.1039/d4ay01919a 
2. Kaur, M., Sharma, A. and Singh, B., 2025. Analytical challenges in the detection of toxic glycols in pediatric syrup formulations: A regulatory perspective. Journal of Pharmaceutical Analysis, 15(2), pp. 88-96.
3. Reddy, V. and Prasad, S., 2025. High-throughput screening of synthetic colorants in pediatric oral liquids using LC-MS/MS. Indian Journal of Pharmaceutical Sciences, 87(1), pp. 45-55.
4. Gupta, P. and Verma, R., 2024. Quality surveillance of pediatric medicines: A review of analytical strategies for adulterant detection in LMICs. Journal of Applied Pharmaceutical Science, 14(3), pp. 12-25.
5. Mishra, S., Pandey, K. and Dixit, A., 2024. Development of a green HPLC method for the simultaneous determination of ethylene glycol and diethylene glycol in cough syrups. Sustainable Chemistry and Pharmacy, 38, 101452.
6. Sharma, N. and Bakshi, M., 2024. Risk assessment and analytical monitoring of diethylene glycol contamination in pediatric oral liquids. Drug Safety, 47(5), pp. 412424.
7. Arunachalam, S. and Kumar, S., 2023. Evaluation of chemical adulterants in pediatric formulations: Impact on public health in India. Indian Journal of Pharmacology, 55(4), pp. 210-218.
8. Iyer, S. and Krishnan, L., 2023. Phytosome-mediated delivery and quality control of herbal pediatric liquids: Analytical perspectives. Journal of Liposome Research, 33(2), pp. 145-155.
9. Pulluri, K.K. and Kumar, V.N., 2022. Qualitative and quantitative detection of food and liquid adulteration using a smart E-Nose. Sensors, 22(20), 7789. https://doi.org/10.3390/s22207789 
10. Bansal, V. and Gupta, M., 2022. Nanostructured platforms for the rapid detection of counterfeit pediatric drugs. Journal of Drug Delivery Science and Technology, 74, 103522.
11. Rana, S. and Singh, R., 2022. Histopathological and analytical correlation in cases of glycol poisoning from adulterated pediatric syrups. Journal of Medical Toxicology, 18(3), pp. 198-210.
12. Sivakumar, V. and Rajeshkumar, S., 2022. Green synthesis of nanosensors for the detection of heavy metal adulterants in pediatric oral fluids. International Journal of Pharma Sciences and Research, 13(6), pp. 262-270.
13. Jain, S., Yadav, P.P. and Gill, V., 2021. Pharmacovigilance of pediatric oral liquids: An analytical review of adulteration trends. Phytochemistry Reviews, 20(3), pp. 512525.
14. Sumitra, M. and Manikandan, P., 2021. Biochemical markers for the early detection of renal toxicity caused by adulterated pediatric syrups. Molecular and Cellular Biochemistry, 476, pp. 135-145.
15. Chaudhari, H.S. and Mahajan, M.S., 2021. Rapid screening of DEG and EG in pharmaceutical grade glycerin using portable NIR spectroscopy. Asian Journal of Pharmaceutical Research, 11(2), pp. 156-160.
16. Tiwari, P. and Patel, R.K., 2020. Stability-indicating RP-HPLC method for the surveillance of pediatric oral liquids. Research Journal of Pharmacology and Pharmacodynamics, 12(4), pp. 110-118.
17. Verma, N. and Singh, A., 2020. Surveillance of non-permitted food colors in pediatric oral formulations in the Indian market. Food Additives & Contaminants: Part A, 37(8), pp. 1245-1258.
18. Goyal, R.K. and Kadnur, S.V., 2020. Analytical perspectives on the detection of synthetic adulterants in herbal pediatric cough syrups. Current Pharmaceutical Design, 26, pp. 3120-3132.
19. Kaur, N. and Sirhindi, G., 2019. Impact of adulterants on the physicochemical properties of pediatric oral liquids. International Journal of Pharmaceutical Sciences and Research, 10(4), pp. 468-478.
20. Dinday, S. and Srivastava, T., 2019. Application of chemometrics in the detection of adulteration in liquid pediatric formulations. Journal of Chemometrics, 33(10), e3175.
21. Parveen, R. and Baboota, S., 2018. Analytical challenges in the authentication of pediatric herbal liquids. Journal of AOAC International, 101(4), pp. 1120-1132.
22. Subasini, R. and Somasundaram, S., 2017. Quality control of pediatric medicines: A study on the presence of harmful preservatives. Indian Journal of Experimental Biology, 55(7), pp. 445-452.
23. Amalraj, A. and Gopi, S., 2017. Medicinal properties and quality surveillance of pediatric oral liquids: A review. Journal of Traditional and Complementary Medicine, 7(1), pp. 65-78.
24. Shukla, S.K. and Sharma, B., 2016. Forensic analysis of adulterated pediatric syrups: A case study of glycol poisoning. Archives of Physiology and Biochemistry, 122(1), pp. 18-25.
25. Devi, P. and Ghosh, A., 2016. Detection of unapproved sweeteners in pediatric oral liquids using HPTLC. Journal of Planar Chromatography, 29(4), pp. 290-298.
26. Reddy, B.R. and Lokesh, S., 2025. Emerging trends in microfluidic "Lab-on-a-Chip" devices for the detection of counterfeit pediatric oral liquids. Journal of Pharmaceutical Innovation, 20(1), pp. 45-58.
27. Saxena, R., Gupta, A. and Mehra, K., 2024. Development of a rapid electrochemical sensor for the detection of melamine and other nitrogenous adulterants in liquid formulations. Sensors and Actuators Reports, 6, 100182.
28. Desai, P. and Kulkarni, V., 2024. High-resolution mass spectrometry (HRMS) as a tool for fingerprinting unknown contaminants in pediatric syrups. Indian Journal of Pharmaceutical Education and Research, 58(2), pp. 312-320.
29. Choudhary, M. and Tyagi, S., 2023. Impact of plasticizer migration from PET bottles into pediatric oral liquids: An analytical surveillance study. Journal of Packaging Technology and Research, 7(3), pp. 189-201.
30. Joshi, H., Shah, K. and Patel, M., 2023. Chemometric-assisted UV spectrophotometry for      the detection of illegal synthetic dyes in pediatric cough syrups. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 285, 121910.
31. Vats, A. and Singh, R.P., 2023. A comprehensive review on the global regulatory landscape for glycol limits in pediatric pharmaceuticals. Therapeutic Innovation & Regulatory Science, 57, pp. 445-459.
32. Bhattacharya, S. and Mukhopadhyay, A., 2022. Evaluation of microbial contamination and preservative efficacy in multi-dose pediatric oral liquids. Journal of Applied Microbiology, 133(4), pp. 2311-2324.
33. Sarin, R. and Kumar, A., 2022. HPTLC-based screening for the presence of heavy metals in herbal-based pediatric oral formulations. Journal of Planar Chromatography – Modern TLC, 35(1), pp. 88-95.
34. Mehta, P. and Shah, R., 2022. Quantitative analysis of sorbitol and glycerin purity in pediatric liquids using refractive index-based HPLC. Asian Journal of Pharmaceutics, 16(2), pp. 145-152.
35. Pillai, S. and Menon, V., 2021. Application of Raman spectroscopy for the noninvasive authentication of pediatric syrups through glass packaging. Journal of Raman Spectroscopy, 52(11), pp. 1910-1922.
36. Gaur, A. and Dwivedi, J., 2021. Detection of undeclared antihistamines in pediatric "soothing" syrups using LC-MS. Biomedical Chromatography, 35(8), e5112.
37. Nair, A. and Jacob, S., 2020. Challenges in the stability testing of pediatric oral liquids in tropical climates: A quality surveillance report. Pharmaceutics, 12(6), 540.
38. Pandey, V. and Soni, V., 2020. Development of a validated HPLC-DAD method for the simultaneous detection of six common adulterants in pediatric paracetamol syrups. Journal of Chromatographic Science, 58(9), pp. 812-820.
39. Sarma, H. and Baruah, B., 2020. Toxicological implications of using industrial-grade propylene glycol in pediatric medicines. Toxicology Reports, 7, pp. 1112-1118.
40. Tripathi, S. and Dubey, R., 2019. Monitoring of volatile organic impurities in pediatric liquids using Headspace Gas Chromatography (HS-GC). Indian Journal of Pharmaceutical Sciences, 81(4), pp. 610-618.
41. Khanna, R. and Taneja, S., 2019. Comparative study of various pharmacopoeial methods for the detection of ethylene glycol in pediatric formulations. International Journal of Quality Assurance, 10(2), pp. 145-153.
42. Rao, M. and Halthur, S., 2019. Surveillance of artificial sweeteners in pediatric oral liquids: An HPLC-ELSD approach. Food Analytical Methods, 12, pp. 2455-2465.
43. Giri, T.K. and Singh, D., 2018. Current status of pediatric drug safety in India: A focus on liquid formulation quality. Therapeutic Drug Monitoring, 40(3), pp. 310-322.
44. Uppal, S. and Kumar, R., 2018. Use of Ion Chromatography for the detection of harmful inorganic ions in pediatric oral rehydration salts (ORS) liquids. Journal of Liquid Chromatography & Related Technologies, 41(5), pp. 256-263.
45. Reddy, M. and Kumar, P., 2018. Evaluation of sub-therapeutic dosing caused by degradation of active ingredients in poorly stored pediatric syrups. Drug Development and Industrial Pharmacy, 44(8), pp. 1290-1301.
46. Sahoo, S. and Prasad, K., 2017. Quality by Design (QbD) approach for the development of robust analytical methods for pediatric drug surveillance. Journal of Young Pharmacists, 9(1), pp. 12-18.
47. Thakur, S. and Chaudhary, G., 2017. Risk of lead and cadmium contamination in pediatric oral liquids: A market surveillance study. Environmental Monitoring and Assessment, 189(4), 155.
48. Upadhyay, A. and Dixit, M., 2017. Analytical method validation for the detection of diethylene glycol at trace levels in pediatric syrups. Journal of Analytical Science and Technology, 8(1), pp. 22-30.
49. Varghese, J. and George, A., 2017. Role of nuclear magnetic resonance (NMR) spectroscopy in the rapid detection of counterfeit pediatric liquids. Magnetic Resonance in Chemistry, 55(9), pp. 810-818.
50. Soni, R. and Rathore, N., 2016. Forensic analytical techniques for investigating mass poisoning incidents related to pediatric syrups. Forensic Science International, 262, pp. e1-e7.
51. Bhutani, K.K. and Gohil, V., 2016. Standardization of herbal pediatric formulations: Meeting the analytical challenges. Indian Journal of Natural Products and Resources, 7(2), pp. 101-112.
52. Dave, K. and Mistry, S., 2016. Evaluation of p-hydroxybenzoic acid esters as preservatives in pediatric oral liquids: A safety survey. Journal of Pediatric Pharmacology and Therapeutics, 21(4), pp. 320-330.
53. Pawar, R.S. and Bhutani, K.K., 2016. Challenges in determining the purity of excipients used in pediatric liquid dosage forms. Phytochemical Analysis, 27(3), pp. 185-195.
54. Zaveri, M. and Khandhar, A., 2016. Investigation of sugar-free pediatric syrups for hidden caloric content and unlisted sweeteners. International Journal of Pharmaceutical Sciences and Research, 7(11), pp. 4510-4518.
55. Gupta, R. and Singhal, S., 2016. Development of a simplified colorimetric test for the field-level detection of DEG in pediatric syrups. Bulletin of the World Health Organization, 94(4), pp. 288-295.