Design And Application Of Thermal Desorption Gas Chromatography-mass Spectrometry Method For The Detection Of Chlorinated Hydrocarbon Solvents In Textiles

Textiles are closely related to our lives.Chlorinated hydrocarbon solvents are used to dissolve organic substances in the dyeing and finishing processes of textile industry,but chlorinated hydrocarbon solvents are harmful to human health and cause environmental pollution.The textile limit standard Oeko-Tex Standard 100 puts forward the limit requirements for the residue of 15 chlorinated hydrocarbons,and it is particularly important to design the detection method for detecting 15 chlorinated hydrocarbon solvents in textiles.This paper designs a unified detection method for 15 chlorinated hydrocarbon solvents.Combined with the theory of thermal desorption,the volatile substances in textiles are collected by sampling bag method and direct injection method respectively,and the thermal desorption method is used for pretreatment,and gas chromatography-mass spectrometry is used for quantitative and qualitative analysis.The results of methodological validation meet the detection requirements.When the content of chlorinated hydrocarbons in textiles is 5～100 ng,the linear correlation coefficient is 0.9913-0.9993.The detection limit of sampling bag method is 0.006-0.028μg/kg,quantitative limit is 0.021-0.092 μg/kg,the recovery rate is 85～95.3%,and the standard deviation is less than 8%;The detection limit of direct injection method is0.016-0.069 μg/kg,the quantitative limit is 0.054-0.230 μg/kg,the recovery rate is90.5～102.1%,and the standard deviation is less than 7%.When a large number of textile samples were tested in practice,chlorinated hydrocarbons contained in textiles were successfully detected.The method of thermal desorption gas chromatography mass spectrometry is used to detect chlorinated hydrocarbons in textiles.The linear correlation of the method is large,the detection limit and quantitative limit are low,and the accuracy is high.The detection results meet the limit requirements of Oeko-Tex Standard 100 for 15 chlorinated hydrocarbon solvents in textiles,so as to achieve the purpose of detecting trace substances in textiles.