無炎原子吸光法による硫黄並びに硫化鉄中の微量水銀の定量

概要

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A method was developed for the determination of trace mercury in sulfur or pyrite by atomic absorption spectrometry. Atomization of mercury as well as its separation from sample matrics was performed by electric heating. In order to avoid vaporization of sulfur or/and pyrite, the sample was covered with silver powder which was most effective of metal powders and oxides examined. The analytical procedure is as follows: About 0.1 g of sample is weighed in a silica boat, covered with (1.5〜2.5) g of electro-deposited silver powder, and heated at about 400 ℃. The mercury vapor generated is introduced into a cold trap with argon carrier gas. The amalgamated mercury thus obtained is then released by heating the gold trap at 700 ℃ and the absorbance based on mercury is measured at 253.7 nm. The analytical results for (1.0〜2.5) ppm mercury in sulfur and pyrite samples were in good agreement with those obtained by the atomic absorption spectrometry after reduction of mercury (II) in the sample solution by tin(II) chloride.
社団法人日本分析化学会の論文
1980-12-05