ゼフィラミン-チオシアナトピリジンニッケル(II)酸錯体のイオン対抽出を用いるニッケルの黒鉛炉原子吸光分析

概要

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A solvent extraction system with Zephiramine-thio-cyanatopyridinenickel (II)-chloroform was investigated for the use of a pretreatment procedure in a graphite furnace atomic-absorption spectrometric determination of nickel. In contrast to cobalt(II)^5), Zephiramine-thiocyanatonickel (II) could not be extracted into chloroform without pyridine in the aqueous phase. When the aqueous/organic phase volume ratio was 25 ml/5 ml, the best extraction of nickel was observed in the pH range of 5.1 〜 11.8, provided that the concentrations of Zephiramine, potassium thiocyanate and pyridine were kept at 4.0 × 10^<-3>M, 5.0 × 10^<-2> M and 0.16 %, respectively. As for the measurement of atomic-absorption, the organic extract (20μ1) was injected into a graphite furnace and then dried (200 ℃-30 s), ashed (930 ℃-60 s) and atomized (2900 ℃-10s) with an argon flow rate. pf 3 l/min. The linearity of the absorbance (232.0nm nickel : line) vs. the concentration of nickel was good up to 3μg of nickel in the aqueous phase. The coefficient of variation obtained from 10 runs was 2.0 % for the determination of 3.0μg of nickel. Numerous cations and anions gave no interfering effect even when present in 1000-fold amounts (by weight) over nickel. This method was applied to the analysis of waste water from a plating factory.
社団法人日本分析化学会の論文
1980-11-05