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文章摘要
付文慧,艾兆春,葛艳梅,李亚.火焰原子吸收光谱法测定高品位金矿石中的金[J].岩矿测试,2013,32(3):427-430
FU Wen-hui,AI Zhao-chun,GE Yan-mei,LI Ya.Determination of Au in High Grade Gold Deposits by Flame Atomic Absorption Spectrometry[J].Rock and Mineral Analysis,2013,32(3):427-430.DOI:
火焰原子吸收光谱法测定高品位金矿石中的金
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Determination of Au in High Grade Gold Deposits by Flame Atomic Absorption Spectrometry
投稿时间:2012-09-17  修订日期:2012-10-20
DOI:
中文关键词: 高品位金矿石    火焰原子吸收光谱法
英文关键词: high grade of gold deposit  Au  Flame Atomic Absorption Spectrometry
基金项目:
作者单位
付文慧 黑龙江省地质矿产测试应用研究所, 黑龙江 哈尔滨 150036 
艾兆春 国防科技工业2311二级计量站, 黑龙江 哈尔滨 150046 
葛艳梅 黑龙江省地质矿产测试应用研究所, 黑龙江 哈尔滨 150036 
李亚 黑龙江省地质矿产测试应用研究所, 黑龙江 哈尔滨 150036 
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中文摘要:
      采用经典火试金法测定高品位金,操作流程长,影响因素多,在铅扣灰吹过程中易挥发逸出大量的铅,对实验环境造成严重污染。本文将20.0~100.0 g取样量先分成若干小样量进行焙烧,经50%王水完全分解后分离滤渣,所得若干份滤液定容于同一容量瓶内,分取适量体积进行泡沫塑料富集,将富集金的泡沫塑料灰化后用浓王水复溶,以火焰原子吸收光谱法(FAAS)测定高品位金矿石中金的含量。方法检出限为0.101 μg/g,通过多个国家一级标准物质和分析样品验证,准确度和精密度满足相关要求。此方法测定灵敏度高,取样量为20.0~100.0 g,有效地提高FAAS法取样代表性,同时拓展了FAAS法测定矿石中金的含量范围,针对50.0~550.0 μg/g中高含量段的金结果同样可靠。
英文摘要:
      The conventional fire assay method to determine high grade gold has a long chemical procedure with many factors influencing the analysis result. Moreover, the ash blowing process for the Pb button volatilizes a large amount of Pb, causing serious pollution to the environment. In this paper, a method is described whereby the 20.0-100.0 g sample was split into small amounts and calcinated. The products of calcination were dissolved by 50% aqua regia and the residues were filtered. All the clean filtrates were loaded into a volumetric flask. An appropriate volume of solution was selected to extract Au with foam enrichment. After ashing the Au bearing foams, the Au was dissolved again by concentrated aqua regia. Then, the Au was measured by Flame Atomic Absorption Spectrometry (FAAS). The detection limit was 0.101 μg/g. Through verifications for a few national first grade standard materials and the analysis samples, the accuracy and precision met the relevant requirements. The sampling weight was from 20.0 g to 100.0 g which effectively improved the sample representativeness and extended the analysis content range for Au by FAAS. This method is also suitable for samples with Au contents from 50.0 μg/g to 550.0 μg/g.
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