Determination of Perfluorochemicals in Cow鈥檚 Milk Using Liquid Chromatography-Tandem Mass Spectrometry
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- 作者：Wendy M. Young ; Paul South ; Timothy H. Begley ; Gregory W. Diachenko ; Gregory O. Noonan
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2012
- 出版时间：February 22, 2012
- 年：2012
- 卷：60
- 期：7
- 页码：1652-1658
- 全文大小：251K
- 年卷期：v.60,no.7(February 22, 2012)
- ISSN：1520-5118
文摘
This study describes a new method developed for detection of 10 different perfluorochemicals (PFCs) in cow鈥檚 milk, seven perfluorinated carboxylates and three perfluorinated sulfonate salts. After attempting multiple methods employing both acidic and basic extractions, a basic extraction using 10 mM sodium hydroxide in methanol digestion along with weak anion-exchange solid-phase extraction was employed. Vortex mixing and varying sonication times were compared as part of sample processing. Results show that sonication during sample processing yield decreased recovery of longer chain perfluorinated carboxylates. The final method developed was used to determine the concentration of PFCs in 12 raw and 49 retail milk samples from across the United States. With the exception of a single raw milk sample obtained from a dairy farm that had applied PFC containing biosolids to its fields, there were no milk samples containing PFCs.