Simultaneous determination of three components in food detergents by headspace gas chromatography-mass spectrometry
A method for simultaneous determination of methanal,methanol and 1,4-dioxane in food detergents by headspace gas chromatography-mass spectrometry(HS-GC-MS)was established.The influencing factors of headspace sampling were analyzed by single factor variance analysis and orthogonal test to determine the optimal conditions.A strong polar column SH-Rtx-Wax(30 m×0.32 mm×0.25 μm)was selected for separation.Selective ion scanning(SIM)mode and external standard method were used for quantitative analysis.The results show that methanal,methanol and 1,4-dioxane have good linear relationships in the ranges of 8-200 μg/mL,8-200 μg/mL and 2-50 μg/mL,respectively.The limits of detection(LOD)are 0.10-0.60 μg/mL,and the limits of quantification(LOQ)are 0.29-1.78 μg/mL.The recovery and precision test of the actual samples are carried out at low,medium and high levels.The recovery rate is 84.0%-101.9%and relative standard deviation(RSD)is 0.5%-3.7%.The method is simple,sensitive and reproducible,which can meet the requirements of simultaneous determination of methanal,methanol and 1,4-dioxane in food detergents,and also provide technical basis and reference for the relevant safety indicators of food detergents in China.
万方数据
维普
