Determination of total mercury in biological tissues by flow injection cold vapour generation atomic absorption spectrometry following tetramethylammonium hydroxide digestion
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作者:
Tao, GH
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Natl Res Council Canada, Inst Natl Measurement Stand, Ottawa, ON K1A 0R9, CanadaNatl Res Council Canada, Inst Natl Measurement Stand, Ottawa, ON K1A 0R9, Canada
Tao, GH
[1
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Willie, SN
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Natl Res Council Canada, Inst Natl Measurement Stand, Ottawa, ON K1A 0R9, CanadaNatl Res Council Canada, Inst Natl Measurement Stand, Ottawa, ON K1A 0R9, Canada
Willie, SN
[1
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Sturgeon, RE
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Natl Res Council Canada, Inst Natl Measurement Stand, Ottawa, ON K1A 0R9, CanadaNatl Res Council Canada, Inst Natl Measurement Stand, Ottawa, ON K1A 0R9, Canada
Sturgeon, RE
[1
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[1] Natl Res Council Canada, Inst Natl Measurement Stand, Ottawa, ON K1A 0R9, Canada
A simple, rapid and reliable method was developed for the determination of total mercury in biological samples. Samples were solubilized using tetramethylammonium hydroxide (TMAH), The organically bound mercury was cleaved and converted to inorganic mercury by on-line addition of KMnO4. The decomposed mercury together with inorganic mercury originally present in samples was determined by flow injection cold vapour atomic absorption spectrometry after reduction to elemental mercury vapour using NaBH4, A sample throughput of 100 measurements per hour was achieved after a 30 min dissolution with TMAH, The relative standard deviation for 20 mu g l(-1) Hg was 1.3% (n = 11) and the limit of detection was 0.1 mu g l(-1) (30). The proposed method was validated by the analysis of a suite of certified marine biological reference materials, DORM-2 (dogfish muscle), DOLT-2 (dogfish liver) and TORT-2 (lobster hepatopancreas), with calibration against simple Hg-II standards.
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International Centre for Environmental and Nuclear Sciences, University of the West Indies, Mona Campus, Kingston, JamaicaInternational Centre for Environmental and Nuclear Sciences, University of the West Indies, Mona Campus, Kingston, Jamaica
Lalor, Gerald
DeSilva, Nimal
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Ottawa-Carleton Chemistry Institute, Department of Chemistry, Carleton University, Ottawa, Ont. K1S 5B6, CanadaInternational Centre for Environmental and Nuclear Sciences, University of the West Indies, Mona Campus, Kingston, Jamaica
DeSilva, Nimal
Rattray, Robin
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International Centre for Environmental and Nuclear Sciences, University of the West Indies, Mona Campus, Kingston, JamaicaInternational Centre for Environmental and Nuclear Sciences, University of the West Indies, Mona Campus, Kingston, Jamaica
Rattray, Robin
Wright, Paul R.D.
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International Centre for Environmental and Nuclear Sciences, University of the West Indies, Mona Campus, Kingston, JamaicaInternational Centre for Environmental and Nuclear Sciences, University of the West Indies, Mona Campus, Kingston, Jamaica