[Determination of mercury in battery by microwave digestion cold atomic absorption spectrometry].
In this paper, a method of microwave digestion followed by cold atomic absorption spectrometry (CAAS) for the determination of mercury in battery was developed. Microwave digestion conditions and operational conditions of CAAS were optimized. The digestive solution was a mixture of hydrochloric acid-sulfuric acid (4:1, volume ratio) and the digestive time was 3 min at a microwave power of 1.0 MPa. The reaction medium was 0.5 mol x L(-1) sulfuric acid at room temperature. The characteristic concentration was 0.25 microg x L(-1). Five battery samples were determined, the recoveries were from 99.9% to 113%, and the relative standard deviations were from 4.85% to 11.9% (n = 6). The analytical results were satisfactory. The method is fast, simple, accurate and solvent-saving.
Tang
Bao-ying
BY
School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China.
Li
Yu-jie
YJ
Xie
Xiao-dan
XD
Li
Gong-ke
GK
Liu
Zhi-hong
ZH
Liu
Li
L
Li
Ying
Y