Analysis of Polybrominated Diphenyl Ethers in Environmental Water Samples Using Zeolitic Imidazolate Framework-8 as Solid Phase Microextraction Coating

KeyWord:zeolite imidazolate framework-8  polybrominated biphenyl ethers(PBDEs)  solid phase microextraction(SPME)  gas chromatography-tandem mass spectrometry(GC-MS/MS)

Abstract:

      A rapid and sensitive method was developed for the analysis of 6 polybrominated biphenyl ethers(PBDEs) at trace levels in environmental water samples by gas chromatography-tandem mass spectrometry(GC-MS/MS) with a synthesized zeolite imidazolate framework-8(ZIF-8) as solid phase microextraction coating.The experimental conditions were optimized with single factor tests£¬and the optimal conditions were as follows£ºextraction time£º50 min£¬extraction temperature£º50 ¡æ£¬pH value£º7ª±0£¬desorption temperature£º280 ¡æ£¬desorption time£º5 min£¬and without salt addition.Under the optimized conditions£¬the calibration curves for 6 PBDEs were linear in the range of 1-1 000 ng/L with limits of detection and limits of quantitation of 0ª±08-2ª±29 ng/L and 0ª±23-7ª±32 ng/L,respectively.The intra day and inter day RSDs were in the range of 4ª±3%-6ª±5% and 6ª±9%-9ª±3%£¬respectively.This method was successfully applied in the analysis of PBDEs in 4 environmental water samples(tap water£¬spring water£¬pond water and landfill waste water) with recoveries of 81ª±6%-109%.