Minimizing chemical interference errors for the determination of lithium in brines by flame atomic absorption spectroscopy analysis

被引：6

作者：

Wen Xianming ^{[1
]}

Ma Peihua

Zhu Geqin

Wu Zhiming

机构：

[1] Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

RARE METALS | 2006年 / 25卷 / 04期

关键词：

analytical chemistry; simplified method; FAAS; lithium; brine; deionization; oxide/hydroxide formation;

D O I：

10.1016/S1001-0521(06)60059-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Chemical interferences (ionization and oxide/hydroxide formation) on the atomic absorbance signal of lithium in FAAS analysis of brine samples are elaborated in this article. It is suggested that inadequate or overaddition of deionization buffers can lead to loss of sensitivities under particular operating conditions. In the analysis of brine samples, signal enhancing and oxide/hydroxide formation inducing signal reduction resulting from overaddition of deionization buffers can be seen with varying amounts of chemical buffers. Based on experimental results, the authors have arrived at the optimized operating conditions for the detection of lithium, under which both ionization and stable compound formation can be suppressed. This is a simplified and quick method with adequate accuracy and precision for the determination of lithium in routine brine samples from chemical plants or R&D laboratories, which contain comparable amounts of lithium with some other components.

引用

页码：309 / 315

页数：7