Analytical Sciences

Determination of Perfluorinated Compounds in Packaging Materials and Textiles Using Pressurized Liquid Extraction with Gas Chromatography-Mass Spectrometry

Gang LV,*^,** Libing WANG,** Shaocong LIU,** and Shufen LI*

*Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering & Technology, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
**Technical Center for Safety of Industrial Products, Tianjin Entry-Exit Inspection and Quarantine Bureau, No. 6 Pukou Road, Hexi District, Tianjin 300042, China

A simultaneous determination method of trace amounts of perfluorinated compounds, such as perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) in packaging materials and textiles, has been developed, using pressurized liquid extraction (PLE) with gas chromatography-mass spectrometry (GC/MS). The perfluorinated compounds were primarily extracted from the samples by a PLE procedure, in which the parameters were optimized by response surface methodology. The solvent was then removed by blowing nitrogen and a silylation step was carried out with N,N-bis(trimethylsilyl)trifluoroacetamide. The silylated compounds were identified and quantified by GC/MS. The proposed method was applied to determine the PFOA and PFOS in polytetrafluoroethylene packaging materials and textiles, where the detection limits of the two compounds were 1.6 and 13.9 ng mL^-1, respectively. The results showed that the concentrations of PFOA and PFOS in the packaging materials and textiles ranged from 17.5 to 45.9 and 33.7 to 81.3 ng g^-1, respectively.

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