title: Development of extraction methods for the analysis of perfluorinated compounds in human hair and nail by high performance liquid chromatography tandem mass spectrometry.
abstract: 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 matrices such as hair and nail for biomonitoring of body burden. Different extraction methods coupled with solid phase extraction were investigated for extraction efficiency. The extracts 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 alkaline digestion performed best for human nail sample. The matrix recoveries of the optimized 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 and precision and were proven to be useful for measuring paired human hair and nail samples collected from the general population.
authors.affiliation: Key Laboratory of Chemical Safety and Health, National Institute of Nutrition and Food Safety, Chinese Center for Disease Control and Prevention, Beijing, China.
authors.forename: Jingguang
authors.initials: J
authors.lastname: Li
authors.forename: Feifei
authors.initials: F
authors.lastname: Guo
authors.forename: Yuxin
authors.initials: Y
authors.lastname: Wang
authors.forename: Jiaying
authors.initials: J
authors.lastname: Liu
authors.forename: Zongwei
authors.initials: Z
authors.lastname: Cai
authors.forename: Jialing
authors.initials: J
authors.lastname: Zhang
authors.forename: Yunfeng
authors.initials: Y
authors.lastname: Zhao
authors.forename: Yongning
authors.initials: Y
authors.lastname: Wu
mesh_terms: D000097:Acetonitriles; D005591:Chemical Fractionation / Q000379:methods*; D002681:China; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005466:Fluorocarbons / Q000032:analysis / Q000302:isolation & purification*; D006197:Hair / Q000737:chemistry*; D006801:Humans; D057230:Limit of Detection; D009262:Nails / Q000737:chemistry*; D015203:Reproducibility of Results; D053719:Tandem Mass Spectrometry / Q000379:methods*
chemical_list: D000097:Acetonitriles; D005466:Fluorocarbons; C032159:acetonitrile