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研究了在非离子型微乳液作用下 ,铬天青S与钍的显色反应 ,建立了一种测定钍的新方法。体系λmax =630nm ,ε=1 2 4× 1 0 5L·moL- 1 ·cm- 1 。钍的含量在 0～ 30 μg/ 2 5mL内符合比尔定律 ,方法用于矿石及合金样品中钍的测定 ,结要满意。
The color reaction of chrome azure S with thorium was studied under the action of nonionic microemulsion, and a new method for the determination of thorium was established. The system λ max = 630 nm, ε = 1 2 4 × 10 5 L · moL -1 · cm -1. Beer’s law is obeyed in the range of 0 ~ 30 μg / 25mL for thorium. The method is applied to the determination of thorium in the ore and alloy samples with satisfactory results.