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陈景伟, 李玉明, 宋双喜, 宋江涛, 初琳. 载炭泡塑吸附-电感耦合等离子体发射光谱法测定金矿石的金量[J]. 岩矿测试, 2015, 34(3): 314-318. DOI: 10.15898/j.cnki.11-2131/td.2015.03.009
引用本文: 陈景伟, 李玉明, 宋双喜, 宋江涛, 初琳. 载炭泡塑吸附-电感耦合等离子体发射光谱法测定金矿石的金量[J]. 岩矿测试, 2015, 34(3): 314-318. DOI: 10.15898/j.cnki.11-2131/td.2015.03.009
Jing-wei CHEN, Yu-ming LI, Shuang-xi SONG, Jiang-tao SONG, lin CHU. Determination of Gold in Gold Ores by Inductively Coupled Plasma-Optical Emission Spectrometry with Carbon-loaded Foam Plastic Adsorption[J]. Rock and Mineral Analysis, 2015, 34(3): 314-318. DOI: 10.15898/j.cnki.11-2131/td.2015.03.009
Citation: Jing-wei CHEN, Yu-ming LI, Shuang-xi SONG, Jiang-tao SONG, lin CHU. Determination of Gold in Gold Ores by Inductively Coupled Plasma-Optical Emission Spectrometry with Carbon-loaded Foam Plastic Adsorption[J]. Rock and Mineral Analysis, 2015, 34(3): 314-318. DOI: 10.15898/j.cnki.11-2131/td.2015.03.009

载炭泡塑吸附-电感耦合等离子体发射光谱法测定金矿石的金量

Determination of Gold in Gold Ores by Inductively Coupled Plasma-Optical Emission Spectrometry with Carbon-loaded Foam Plastic Adsorption

  • 摘要: 载炭泡塑吸附法对金有良好的吸附性能, 但只能用于抽滤吸附不能振荡吸附, 分析手续繁杂。本文以载炭泡塑振荡吸附-电感耦合等离子体发射光谱法测定金矿石的金量。样品在650℃高温灼烧2 h, 用50%王水和10%氯化铁加热溶解, 溶液冷却后加入5%高锰酸钾氧化, 用中密度规格的载炭泡塑两次振荡吸附溶液中的金, 然后于580℃高温灼烧后以50%王水溶解灰分, 直接用ICP-OES测定金量。方法检出限(3σ)为0.002 μg/g, 精密度(RSD, n=11) 小于3.7%。本方法对金的吸附率大于99.9%, 测定范围为0.01~90 μg/g, 对不同类型金矿石的适应性强, 解决了以往泡塑吸附法吸附率较低、标准系列与样品需同时预处理的问题, 对低含量和高含量样品均有较高的准确度。

     

    Abstract: The method of carbon-loaded foam plastic adsorption has good adsorption properties of gold, but is only suitable for filtration adsorption with complicated analytical procedures. Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES) with carbon-loaded foam plastic adsorption was used to determine the content of gold in gold ore and is described in this paper. The gold ore sample was firstly burned at 650℃ for 2 h, followed by dissolution with 50% aqua regia and 10% ferric chloride, then oxidated with 5% potassium permanganate. Gold in the solution was adsorbed twice by carbon-loaded foam plastic. The carbon-loaded foam plastic with gold was burned at 580℃ and dissolved in 50% aqua regia, after which the content of gold could be measured by ICP-OES. The detection limit is 0.002 μg/g and precision (RSD, n=11) is less than 3.7%. The method of gold adsorption rate is greater than 99.9% and the measured range is 0.01-90 μg/g. The method has a strong adaptability to different types of gold ore with higher accuracy for low content and high content of the samples than the previous method.

     

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