T/JXJK 007-2022 Determination of Ethanol Content in Hand Sanitizer Gels Using Gas Chromatography

Scope

Scope: This standard specifies the method for determining the ethanol content in hand sanitizing gels without rinsing. This standard is applicable to the determination of ethanol content in hand sanitizing gels. Main technical contents: 1. The use of capillary gas chromatography columns instead of packed glass columns greatly improves the separation efficiency of ethanol, accelerates the analysis speed, and features low detection limits, high sensitivity, and good reproducibility. 2. To address the problem of strong volatility of ethanol, which easily leads to inaccurate quantitative results, by optimizing the order and method of adding ethanol and water, and using the internal standard method for quantification, the volume errors in the manual injection process are corrected, and the linearity coefficient of the standard curve is ≥0.9999, making the results more accurate. 3. The existing national standard test uses the weighing method, which requires separately preparing a standard curve for the weighing method to quantify the results. However, the weighing method standard curve is not easy to prepare, and different people will obtain different results when testing. After repeated research, this standard finally solves the problems of inaccurate results caused by difficult sampling of hand sanitizing gels and errors in the weighing method standard curve by adding a small amount of hydrochloric acid to make the disinfecting gel from high viscosity to low viscosity, and then sampling by volume and quantifying with a volume standard curve, thus solving the problems of inaccurate results caused by difficult sampling of disinfecting gels and errors in the weighing method standard curve.

Development Information

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