Simultaneous Determination of 18 Chlorinated Hydrocarbon Organic Solvents in Dyeing and Finishing Auxiliaries by Gas Chromatography-Mass Spectrometry

KeyWord:gas chromatography-mass spectrometry(GC-MS)  chlorinated hydrocarbon organic solvents  dyeing and finishing auxiliaries

Abstract:

      A method of gas chromatography-mass spectrometry(GC-MS) was developed for the simultaneous determination of 18 chlorinated hydrocarbon organic solvents in dyeing and finishing auxiliaries.The sample of dyeing and finishing auxiliaries with proper amount of sodium chloride was extracted by oscillation with n-tetradecane,then separated on a DB-624 IU column(30 m¡Á0.25 mm,1.4 ¦Ìm),and finally detected by GC-MS with EI source in SIM mode.External standard method was used for the quantitative determination.Results revealed that the 18 chlorinated hydrocarbon organic solvents could be separated within 19 min,and their calibration curves showed good linearity in the range of 0.2-100 mg/L with correlation coefficients(r2) no less than 0.999 2.The limits of detection(LODs,S/N=3) and the limits of quantification(LOQs,S/N=10) were in the ranges of 0.033-0.063 mg/L and 0.11-0.19 mg/L,respectively.At three spiked levels of low,medium and high,the average recoveries for 18 analytes in fluorescent brightener 1#(liquid) and softener 2#(solid) were in the ranges of 93.3%-104% and 92.7%-104%,with their relative standard deviations(RSDs) of 3.5%-5.3% and 3.2%-5.4%(n=6),respectively.This method was applied in the determination of 23 dyeing and finishing auxiliaries with different properties,and tetrachloroethylene was detected in 3 dyeing and finishing auxiliaries.With the advantages of high sensitivity,good precision and accuracy,the method is suitable for the determination of chlorinated hydrocarbon organic solvents in all kinds of dyeing and finishing auxiliaries,and provides a good strategy for further quality control of dyeing and finishing auxiliaries.