Simultaneous Determination of Residual Glycol Ethers in Leather and Leather Products by Gas Chromatography Coupled with Microwave-assisted Extraction

An effective method was established for the simultaneous determination of residual glycol ethers in leather and leather products by gas chromatography-flame ionization detector(GC-FID)technique,coupled with microwave assisted extraction.Glycol ethers in leather and leather products were microwave-assisted extracted at 85℃,using methanol as the extraction solvent.The extracts were then purified bysolid phase extraction(SPE)column,followed by the analysis of gas chromatography flameionization detector(GC-FID).The contents of each analyte were calibrated by external standard method.The limits of detection (LODs) varied from 0.05mg/kg to 0.30mg/kg atthecondition of signal to noise(S/N) of 3,far less than the limited requirements of Regulation Concerning Registration,Evaluation,Authorization and Restriction of Chemicals(REACH) of European Union.The spiked average recoveries changed from 81.21% to 98.16% while the relative standard deviation(RSD) varied from 1.36% to 4.87%.The proposed method was simple,rapid and sensitive,and completely met the technical demands of the determination of glycol ethers in leather and leather products.The proposed method provided are ference for the relevant testing standard.