Methylmercury determination by Purge and Trap–GC–FTIR–AAS after NaBH4 derivatization of an environmental thiosulfate extract
- 1 December 1994
- journal article
- research article
- Published by Wiley in Applied Organometallic Chemistry
- Vol. 8 (7-8) , 687-691
- https://doi.org/10.1002/aoc.590080720
Abstract
A method of detecting methylmercury species (MeHg) and dimethylmercury (DMM) has been studied. MeHg was transformed prior to its determination as methylmercury hydride (MMH) by use of NaBH4. The two volatile forms of organic mercury were detected by a purge and trap (PT) unit in‐line with a gas chromatograph (GC) connected with a Fourier transform infrared spectrometer (FTIR) which was also in‐line with an atomic absorption spectrometer (AAS). Environmental samples were analyzed by this technique. MeHg was detected in thiosulfate extracts of fish and sediment, and MeHg and DMM directly in water samples. Picogram levels of sensitivity were obtained, the limit of detection being 100 pg for MeHg and 50 pg for DMM. The calibration graph was linear for both compounds up to 10 ng as Hg.Keywords
This publication has 16 references indexed in Scilit:
- Determination of volatile mercury species at the picogram level by low-temperature gas chromatography with cold-vapour atomic fluorescence detectionPublished by Elsevier ,2002
- Alkylation of ionic mercury to methylmercury and dimethylmercury by methylcobalamin: Simultaneous determination by purge‐and‐trap GC in line with FTIRApplied Organometallic Chemistry, 1993
- Determination of methylmercury in fish samples using GC/AA and sodium tetraethylborate derivatizationAnalytical Chemistry, 1993
- Occurrence of methylated tin and dimethyl mercury compounds in a mangrove core from Sepetiba Bay, BrazilApplied Organometallic Chemistry, 1992
- Determination of Methyl- and Ethylmercury in Natural Waters at Sub-nanogram per Liter Using SCF-Adsorbent Preconcentration ProcedureInternational Journal of Environmental Analytical Chemistry, 1987
- Determination of trace amounts of organic and mercury in biological materials by graphite furnace atomic absorption spectrometry and organic mercury speciation by gas chromatographyAnalytical Chemistry, 1987
- Determination of methylmercury in the muscle of marine fish by cold-vapour atomic absorption spectrometryAnalytica Chimica Acta, 1978
- Spectrophotometric determination of methylmercury in fish tissue with dithizone using a dual-wavelength procedureThe Analyst, 1978
- Selective atomic-absorption determination of inorganic mercury and methylmercury in undigested biological samplesThe Analyst, 1971
- Determination of Methylmercury Salts in Various Kinds of Biological Material.Acta Chemica Scandinavica, 1968