Determination of short-chain chlorinated paraffins in ambient air using high-volume sampling combined with high resolution gas chromatography-electron capture negative ion-low resolution mass spectrometry

doi:10.3724/SP.J.1123.2015.08032

Abstract

Abstract:

An analytical method for quantifying short-chain chlorinated paraffins (SCCPs) in ambient air using high-volume sampling combined with high resolution gas chromatography-electron capture negative ion-low resolution mass spectrometry (HRGC-ECNI-LRMS) was developed. An acidified silica gel column and a basic alumina column were used to optimize the cleanup procedures. The results showed a good linearity (R²＞0.99) between the total response factors and the degree of chlorination of SCCPs in the content range of 58.1%-63.3%. The limits of detection (S/N≥3) and the limits of quantification (S/N≥10) were 4.2 and 12 pg, respectively. The method detection limit (MDL) for SCCPs was 0.34ng/m³ (n=7). The recoveries of SCCPs in air samples were in the range of 81.9% to 94.2%. It is demonstrated that the method is suitable for the quantitative analysis of SCCPs in air samples.

Key words: air, high resolution gas chromatography-electron capture negative ion-low resolution mass spectrometry (HRGC-ECNI-LRMS), high-volume sampling, short-chain chlorinated paraffins (SCCPs)

CLC Number:

O658

SHI Leimeng, GAO Yuan, HOU Xiaohong, ZHANG Haijun, Zhang Yichi, CHEN Jiping. Determination of short-chain chlorinated paraffins in ambient air using high-volume sampling combined with high resolution gas chromatography-electron capture negative ion-low resolution mass spectrometry[J]. Chinese Journal of Chromatography, 2016, 34(2): 202-208.

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