有机试剂增感原子吸收法测定镍

Atomic Absorption Spectrophotometry of Nickel Using the Enhancing Effect of Organic Reagents

本文在空气—乙炔焰中,研究了SDS,CTAC和苯胺等对镍原子化行为的影响。SDS等试剂对镍吸收值均有显著的增感效应。当SDS或CTAC和苯胺共存时,其增感效应更大,且具有一定的加和性。有机试剂体系在增感的同时,亦提高了镍的选择性。所拟定的分析方法,用于MnV钢标样中镍的测定,结果满意。

In the atomic absorption spectrophotometry with air-acetylene flame the sodium dodecyl sulpha-te(SDS), cetyl trimethylammonium chloride or aniline can increase the sensitivity of nickel respectively. When both SDS(or CTAC)and aniline coexist in the test solution more marked enhancement effect is produced. The enhancing extent of double organic reagents is basically equal to the sum of enhancement effect of both SDS(or CTAC)and aniline. The mechanism of enhancement was also discussed. Under definite conditions the recovery of nickel is 96 to 107%. The standard deviation and relative standard deviation are 0.03 to 0.08 and 0.60 to 1.60%(n=10), respectively, in the various organic reagent systems. The method has been applied to the determination of nickel in steel sample with satisfactory results.