氢化物发生原子荧光光谱法测定锑精矿中痕量砷和汞

[Determination of trace arsenic and mercury in antimony concentrates by hydride generation atomic fluorescence spectrometry].

作者信息

Yuan Ai-Ping, Tang Yan-Xia, Huang Yu-Long, Wang Jing-Ling, Qin Ran, Wu Jian-Ling, Meng Wen-Fei

机构信息

Guangxi Entry-Exit Inspection and Quarantine Bureau, Nanning 530021, China.

出版信息

Guang Pu Xue Yu Guang Pu Fen Xi. 2006 Aug;26(8):1553-6.

PMID:17058971

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 x mL(-1) and 0.002 ng x 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.

摘要

研究了氢化物发生原子荧光光谱法测定锑精矿中痕量砷和汞的方法。研究了样品溶解方法及共存离子的影响。结果表明，王水可将样品完全溶解，溶解的砷和汞量最大。通过加入硫脲 - 抗坏血酸避免了锑精矿中化学元素的干扰。在样品预处理过程中，用酒石酸将锑基体挥发。测定了实际样品中的痕量砷和汞。获得的检出限分别为0.220 ng·mL⁻¹和0.002 ng·mL⁻¹，砷和汞的相对标准偏差（RSD% = 11）分别为1.47%和0.52%，回收率分别为94.0% - 103.0%和98.7% - 102.8%。该方法已证明快速、准确且灵敏度高。