Development of extraction methods for the analysis of per fluorinated compounds in human hair and nail by high performance liquid chromatography tandem mass spectrometry

Perfluorinated compounds (PFCs) are ubiquitous in the environment and are becoming a public health concern. It is desirable to develop sensitive and accurate methods to measure PFCs in non-invasive matrixes such as hair and nail for bio monitoring of body burden. Different extraction methods coupled with solid phase extraction were investigated for extraction efficiency. The extractions were separated, identified and quantified by liquid chromatography-tandem mass spectrometry. Extraction with acetonitrile proved to be the most efficient extraction method for human hair sample, while extraction by methanol with alkylation digestion performed best for human nail sample. The matrix recoveries of the optimised methods ranged from 78% to 116% for hair and from 87% to 126% for nail sample. The ranges of the limit of detection (LOD) were 0.026-0.069 ng/g and 0.023-0.094 ng/g for hair and nail, respectively. These methods were validated by evaluating LOD, accuracy, precision and were proven to be useful for measuring paired human hair and nail samples collected from the general population.

Authors: Li, Jingguang; Guo, Feifei; Wang, Yuxin; Liu, Jiaying; Cai, Zongwei; Zhang, Jialing; Zhao, Yunfeng; Wu, Yongning ;Full Source: Journal of Chromatography, A [online computer file] 2012, 1219, 54-60 (Eng) ;