| 光谱学与光谱分析 |
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| Determination of Trace Au in Mine Sample by Inductively Coupled Plasma Atomic Emission Spectroscopy |
| JI Chun-hong1, LI Jian-qiang1*, HUANG Wen-jie1, BAO Rui2, GUO Ru1, HU Jun-jie1 |
1. School of Applied Science, University of Science and Technology Beijing，Beijing 100083, China
2. Innova Superconductor Technology Co. Ltd., Beijing 100176, China |
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Abstract A method for the determination of trace gold by inductively coupled plasma atomic emission spectrometry (ICP-AES) in mine sample was proposed. The instrument parameters were optimized and the media of solution and interferences were studied systemically. The results showed that in less than 10%(φ) aqua regia medium, the acids had no influences on the determination, and after removing common cations in mineral samples by using 10% hydrochloric acid(φ), the residual matrix elements had no effect on the determination of Au with ICP-AES. The silicon in samples had serious spectral interference to Au 208.2 nm, and the spectral interference was corrected with interference coefficient using the 251.6 nm silicon line. With 10% HCl to remove the matrix and interference correction coefficient to eliminate the interference of silicon, trace gold in high-sulfur tailings samples was determined, the result was identical with the reference values by the method of enrichment with activated carbon-atomic absorption spectrometry. Under the experimental conditions, the detection limit for gold in mine sample was 0.10 g·t-1.
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Received: 2009-06-06
Accepted: 2009-09-08
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Corresponding Authors:
LI Jian-qiang
E-mail: lijq@sas.ustb.edu.cn
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