原子吸光分析法によるケイ酸塩中のニッケルの定量

概要

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About 0.5g of the sample was decomposed with a mixture of HF and HNO3. After having been converted to the chlorides, the residue was dissolved in water and the solution was diluted to 25ml. The apparatus used were a Hitachi Spectrophotometer 139 with its atomic absorption attachment 139-0420 for the determination of ppm order of nickel, and the same spectrophotometer with a long path flame adaptor for 0.11.0ppm of Ni. The air-acetylene flame was used for the former, and the air-hydrogen mixture for the latter. The spectrum line employed was Ni 2320Å. The effects of the hollow cathode lamp current, slit width of the photometer and the burner height on the absorbance of Ni were examined. Virtually no effect was observed of the major elements and various acids in their usual concentration range. The accuracy and recovery by the use of various kinds of glasses and the NBS standards were satisfactory for practical purposes. The results obtained agreed well with those by other methods including emission spectrographic methods
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