Abstract：A method for the determination of trace arsenic and mercury in antimony concentrates by hydride generation atomic fluorescence spectrometry was investigated. The method of dissolving sample and the effect of concomitant ion were studied. It was found that aqua regia can be used to dissolve the sample completely, with maximum quantities of dissolved arsenic and mercury. The interference of chemical elements in antimony concentrates was avoided by adding thiourea-Vc. The matrix of antimony was vaporized with tartaric acid during sample pre-treatment. Trace arsenic and mercury were determined in real samples. The detection limits of 0.220 ng·mL-1 and 0.002 ng·mL-1 were obtained, the relative standard deviations(RSD%=11) are 1.47% and 0.52%, and the recoveries are 94.0%-103.0% and 98.7%-102.8% for As and Hg respectively. This method has proved rapid, accurate and highly sensitive.
[1] ZHANG Yan(张 炎). China Nonferrous Metals Industry(有色金属工业)，2002，(11): 20. [2] GB/T 15080.1～915080.9-1994. Methods for Chemical Analysis of Antimony Concentates(锑精矿化学分析方法). [3] LIU Wei-li, ZHOU Zheng-xiang(刘维理, 周正祥). PTCA Part B Chemical Analysis(理化检验：化学分册), 1999，35(12)：540. [4] LIANG Yi-lun(梁奕伦). Chinese Journal of Spectrum Laboratory(光谱实验室), 1995，12(5): 52. [5] LIANG Yu-sheng(梁云生). Yunnan Metallurgy(云南冶金), 1996，25(5)：47. [6] LI Guang-ming, SONG Xue-ling, GU Wei-guo, et al(李广明，宋雪玲，谷维国，等). PTCA Part B Chemical Analysis(理化检验：化学分册), 2001，37(8)：378. [7] LIU Xi-guang, YU Hua-hua, ZHAO Zeng-qin, et al(刘希光，于华华，赵增芹，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2005，25(6)：964. [8] HUANG Ru-jin, ZHUANG Zhi-xia, WEI Jin-feng, et al(黄汝锦，庄峙厦，魏金锋，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2005，25(10): 1708.
