title: [Determination of trace Au in mine sample by inductively coupled plasma atomic emission spectroscopy].
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% (phi) aqua regia medium, the acids had no influences on the determination, and after removing common cations in mineral samples by using 10% hydrochloric acid(phi), 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 x t(-1).
authors.affiliation: School of Applied Science, University of Science and Technology Beijing, Beijing 100083, China. 43489100@163.com
authors.forename: Chun-Hong
authors.initials: CH
authors.lastname: Ji
authors.forename: Jian-Qiang
authors.initials: JQ
authors.lastname: Li
authors.forename: Wen-Jie
authors.initials: WJ
authors.lastname: Huang
authors.forename: Rui
authors.initials: R
authors.lastname: Bao
authors.forename: Ru
authors.initials: R
authors.lastname: Guo
authors.forename: Jun-Jie
authors.initials: JJ
authors.lastname: Hu