原子吸光分析法によるジルコニウムおよびその合金中の極微量カドミウムの定量

概要

論文の詳細を見る
A method is proposed for the determination of trace cadmium (0.11 ppm) in zirconium and its alloy. The sample is treated with H2SO4, HF-H3BO3 and HNO3 in a covered beaker to complete the dissolution. The solution is adjusted to pH 8 to 10 with aqueous NH3 in the presence of ammonium citrate. Cadmium is extracted into dithizone-chloroform from which it is re-extracted into 1 M HCl (5 ml). The extractant is atomized into the acetylene-air flame of an atomic absorption spectrophotometer ; measurement is made at 228.8 nm, with a hollow-cathode lamp as source. The scale expansion on measurement is taken 10 fold for the detection of less than 1 ppm of cadmium, but the method is applicable to higher concentration of cadmium by reducing the scale expansion. There is no interference from any other elements in zirconium and zircaloy.
社団法人日本分析化学会の論文