Quantitative determination of diethylene glycol contamination in pharmaceutical products.

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Abstract

A simple, rapid, and reliable method was developed for the quantitative determination of diethylene glycol (DEG) in pharmaceutical products using capillary gas chromatography with flame ionization detection. The method uses ethylene glycol as internal standard and allows for the separation of propylene glycol and DEG. The assay was linear in a DEG concentration range between 1.0 and 10.00 mg/mL, with coefficients of variation of 2.3-4.4% for the tested concentrations. Quantitation and detection limits, respectively, were 1.0 mg/mL and 0.15 mg/mL diethylene glycol. The method was used to analyze 3 pharmaceutical products possibly contaminated with diethylene glycol, of which one was suspected of causing intoxication and death in children. Infrared spectroscopy was used to confirm the identity of diethylene glycol. This analytical methodology is proposed for evaluation of pharmaceutical products containing glycols to prevent intoxication and for security level verification.

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Baffi, P., Elneser, S., Baffi, M., De Melin, M., Baffi, P., Elneser, S., … De Melin, M. (2000). Quantitative determination of diethylene glycol contamination in pharmaceutical products. Journal of AOAC International, 83(4), 793–801. https://doi.org/10.1093/jaoac/83.4.793

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