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Citation: WANG Xiaoyan, SHEN Weijian, WANG Hong, YU Keyao, WU Bin, HU Guoshen, YANG Gongjun. Determination of 10 perfluorinated carboxylic acid compounds in water by gas chromatography-mass spectrometry coupled with negative chemical ionization[J]. Chinese Journal of Chromatography, ;2019, 37(1): 32-39. doi: 10.3724/SP.J.1123.2018.07019 shu

Determination of 10 perfluorinated carboxylic acid compounds in water by gas chromatography-mass spectrometry coupled with negative chemical ionization

WANG Xiaoyan ^1, ,
SHEN Weijian ² ,
WANG Hong ² ,
YU Keyao ² ,
WU Bin ² ,
HU Guoshen ² ,
YANG Gongjun ¹

1.
College of Pharmacy, Chian Pharmaceutical University, Nanjing 210009, China;
2.
Animal, Plant and Food Inspection Center, Nanjing Customs, Nanjing 210009, China

Received Date: 20 July 2018

Fund Project: Yangtze River Delta Project (No. 17395810102)

A method was developed for the simultaneous determination of 10 perfluorinated carboxylic acid compounds in water by gas chromatography-mass spectrometry coupled with negative chemical ionization (GC-NCI-MS). Perfluorinated carboxylic acid compounds were derivatized by trifluoro-N-methyl-N-(trimethylsilyl) acetamide (MSTFA) as the trimethylsilyl derivatization reagent. The water sample was purified and enriched through a weak anion exchange solid phase extraction column and analyzed via GC-NCI-MS. The sample pretreatment, derivation and instrument conditions were optimized. The results showed that the linearity of the 10 perfluorinated carboxylic acid compounds was good in the range of 0.1-10 mg/L with correlation coefficients of 0.9956-0.9993. The limits of detection (LODs) and limits of quantification (LOQs) were 0.5-1.5 μg/L and 1.5-4.5 μg/L, respectively. The spiked recoveries of the blank samples ranged from 70.2% to 112.6% with the relative standard deviations (RSDs) between 2.1% and 14.5% (n=6). The method is simple, sensitive, accurate and precise, and can be used to detect the 10 perfluorinated carboxylic acid compounds in water.
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