摘要
本文提出双波长分光光度法测定含铌镍基高温合金中钽的方法,在柠檬酸—硫酸介质中用S-Br-PADAP显色,于560和620nm波长对进行测量,消除了铌对钽的干扰,合金中大多数元素均不干扰,提高了方法的选择性。在25ml溶液中10～55μg钽符合线性关系。可用于直接测定镍基合金中0.5～3％钽。
A new method of dual-wavelength spectrophotometric determination of tantalum with 5-Br-PADAP in citric acid-sulfuric acid has been developed. It is show that an optimum pair of wavelength is 560 and 620 nm to eleminate the interference of Nb and the selectivity of said method is improved, Beerfs law is obeyed for 10-55g of Ta in 25 ml of solution.The proposed method has been applied to direct determination of 0.5-3%Ta in the Ni-base alloy in the presence of Nb with satisfactory results. The method is accurate, simple, rapid and practicable.
出处
《冶金分析》
CAS
CSCD
北大核心
1989年第2期8-11,共4页
Metallurgical Analysis
