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Comparison of pyrolysis and microwave acid digestion techniques for the determination of mercury in biological and environmental materials

(2003) MICROCHIMICA ACTA. 142(1-2). p.7-12
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Abstract
Microwave digestion reduction-aeration and pyrolysis combined with cold vapour atomic absorption and cold vapour atomic fluorescence are compared for the determination of total mercury in several biological and environmental matrices. The biological samples were digested in a mixture of HNO3/H2O2, the environmental samples in a mixture of HNO3/HClO4. After reduction with SnCl2, the mercury was collected by two-stage gold amalgamation. After microwave digestion reduction-aeration, detection limits of 1.4 ng g(-1) and 0.6 ng g(-1) were obtained for cold vapour atomic absorption spectrometry (CVAAS) and cold vapour atomic fluorescence spectrometry (CVAFS), respectively, for 250 mg of environmental samples. For biological samples (500 mg) the detection limits were 0.7 ng g(-1) (CVAAS) and 0.4 ng g(-1) (CVAFS). After pyrolysis, detection limits of 3.5 ng g(-1) and 1.6 ng g(-1) for CVAAS and CVAFS, respectively, were obtained for a 10 mg sample. Pyrolysis can only be applied when the organic content of the sample is not too high. Accurate results were obtained for 8 certified reference materials of both environmental and biological origin. In addition, a real sludge sample was analysed.
Keywords
cold vapour atomic absorption spectrometry, Mercury, cold vapour atomic fluorescence spectrometry, pyrolysis, microwave digestion reduction-aeration, ATOMIC-ABSORPTION SPECTROMETRY, FLUORESCENCE SPECTROMETRY, CV-AAS, SAMPLES, AMALGAMATION, FISH

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Citation

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Chicago
Melaku, Samuel, Ilse Gelaude, Frank Vanhaecke, Luc Moens, and Richard Dams. 2003. “Comparison of Pyrolysis and Microwave Acid Digestion Techniques for the Determination of Mercury in Biological and Environmental Materials.” Microchimica Acta 142 (1-2): 7–12.
APA
Melaku, S., Gelaude, I., Vanhaecke, F., Moens, L., & Dams, R. (2003). Comparison of pyrolysis and microwave acid digestion techniques for the determination of mercury in biological and environmental materials. MICROCHIMICA ACTA, 142(1-2), 7–12.
Vancouver
1.
Melaku S, Gelaude I, Vanhaecke F, Moens L, Dams R. Comparison of pyrolysis and microwave acid digestion techniques for the determination of mercury in biological and environmental materials. MICROCHIMICA ACTA. 2003;142(1-2):7–12.
MLA
Melaku, Samuel, Ilse Gelaude, Frank Vanhaecke, et al. “Comparison of Pyrolysis and Microwave Acid Digestion Techniques for the Determination of Mercury in Biological and Environmental Materials.” MICROCHIMICA ACTA 142.1-2 (2003): 7–12. Print.
@article{211480,
  abstract     = {Microwave digestion reduction-aeration and pyrolysis combined with cold vapour atomic absorption and cold vapour atomic fluorescence are compared for the determination of total mercury in several biological and environmental matrices. The biological samples were digested in a mixture of HNO3/H2O2, the environmental samples in a mixture of HNO3/HClO4. After reduction with SnCl2, the mercury was collected by two-stage gold amalgamation. After microwave digestion reduction-aeration, detection limits of 1.4 ng g(-1) and 0.6 ng g(-1) were obtained for cold vapour atomic absorption spectrometry (CVAAS) and cold vapour atomic fluorescence spectrometry (CVAFS), respectively, for 250 mg of environmental samples. For biological samples (500 mg) the detection limits were 0.7 ng g(-1) (CVAAS) and 0.4 ng g(-1) (CVAFS). After pyrolysis, detection limits of 3.5 ng g(-1) and 1.6 ng g(-1) for CVAAS and CVAFS, respectively, were obtained for a 10 mg sample. Pyrolysis can only be applied when the organic content of the sample is not too high. Accurate results were obtained for 8 certified reference materials of both environmental and biological origin. In addition, a real sludge sample was analysed.},
  author       = {Melaku, Samuel and Gelaude, Ilse and Vanhaecke, Frank and Moens, Luc and Dams, Richard},
  issn         = {1436-5073},
  journal      = {MICROCHIMICA ACTA},
  keyword      = {cold vapour atomic absorption spectrometry,Mercury,cold vapour atomic fluorescence spectrometry,pyrolysis,microwave digestion reduction-aeration,ATOMIC-ABSORPTION SPECTROMETRY,FLUORESCENCE SPECTROMETRY,CV-AAS,SAMPLES,AMALGAMATION,FISH},
  language     = {eng},
  number       = {1-2},
  pages        = {7--12},
  title        = {Comparison of pyrolysis and microwave acid digestion techniques for the determination of mercury in biological and environmental materials},
  url          = {http://dx.doi.org/10.1007/s00604-002-0948-y},
  volume       = {142},
  year         = {2003},
}

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