Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1209, Issue 1-2, Pages 267-270Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2008.09.037
Keywords
Stir bar sorptive extraction (SBSE); Thermal desorption (TD); Speciation analysis; Mercury; Drinking water; Gas chromatography-mass spectrometry (GC-MS)
Funding
- Ministry of Health, Labour and Welfare, Japan
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A method for mercury analysis and speciation in drinking water was developed, which involved stir bar sorptive extraction (SBSE) with in situ propyl derivatization and thermal desorption (TD)-GC-MS. Ten millilitre of tap water or bottled water was used. After a stir bar, pH adjustment agent and derivatization reagent were added, SBSE was performed. Then, the stir bar was subjected to TD-CC-MS. The detection limits were 0.01 ng mL(-1) (ethylmercury; EtHg), 0.02 ng mL(-1) (methylmercury; MeHg), and 0.2 ng mL(-1) (Hg(II) and diethylmercury (DiEtHg)). The method showed good linearity and correlation coefficients. The average recoveries of mercury species (n = 5) in water samples spiked with 0.5, 2.0, and 6.0 ng mL(-1) mercury species were 93.1-131.1% (RSD < 11.5%), 90.1-106.4% (RSD < 7.8%), and 94.2-109.6% (RSD < 8.8%), respectively. The method enables the precise determination of standards and can be applied to the determination of mercury species in water samples. (C) 2008 Elsevier B.V. All rights reserved.
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