铂铑网及铂铑网灰中铬的原子吸收光谱分析

Spectrum Analysis of Chrome Atom Absorption in the Pt-Rh Mesh and Ash

建立了用空气 -乙炔火焰原子吸收光谱分析铂铑网及铂铑网灰中铬的分析方法。研究了样品的处理 ,样品处理液中共存元素的干扰和抑制。该方法灵敏度高、准确度好 ,在最佳实验条件下 ,测定铂铑网及铂铑网灰中铬的最小检测限为 0 1μg/g ,变异系数≤ 1% ,加标回收率为 93%～ 98%。

The Air-C 2H 2 flame atom absorption spectrophotography was developed for the determination of chrome in the Pt-Rh mesh and ash. Treatment of the sample, interference and restraint of the coexist chemical element were studied.Under optimum conditions,the detection limit for chrome was 0.1?μg/g,the relation standard deviation (RSD) of determination was below 1%,and the recovery of standard addition method was from 93% to 98% . This method is highly accurate and sensitive.