Reduction of calcium interference on barium using the nitrogen-shielded nitrous oxide-acetylene flame in atomic absorption spectroscopy.

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概要

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• The interference effects of calcium on barium in atomic absorption spectroscopy, <I>i.e.</I>, background absorption and noise effect having been attributed to the CaOH green band were further studied. The behavior of the interfering calcium hydroxide radical and the barium atom itself was studied in relation to the distribution of natural species, OH and CN, using conventional and nitrogen-shielded nitrous oxide–acetylene flames. A remarkable reduction in the calcium interference was demonstrated using a nitrogen-shielded version of moderately fuel-rich flames. This effect was attributed to the suppression of CaOH formation which was brought about by an improvement in the reducing nature of the flame with shielding.

• 公益社団法人 日本化学会の論文

著者

• Kawamura Hisao

  Division of Environmental Contamination, National Institute of Radiological Sciences

• Kawamura Hisao

  Division of Radioecology, National Institute of Radiological Sciences

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• Reduction of calcium interference on barium using the nitrogen-shielded nitrous oxide-acetylene flame in atomic absorption spectroscopy.
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