| 石墨炉原子吸收法测定地球化学样品中的痕量金 |
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| 引用本文： | 马建学,许卓,刘庆昌,路学东.石墨炉原子吸收法测定地球化学样品中的痕量金[J].中国西部科技,2009,8(33):37-39,72. |
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| 作者姓名： | 马建学 许卓 刘庆昌 路学东 |
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| 作者单位： | 中国人民武装警察部队黄金第一支队,黑龙江牡丹江157021 |
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| 摘 要： | 试料经高温焙烧后,用王水（50%）在电热板上加热溶解,在王水溶液的体积分数φ（王水）为10～15%和少量三氯化铁的介质中,用聚氨酯泡沫塑料吸附,再用硫脲—盐酸（10g/L）溶液解脱,所得溶液用Z-2000石墨炉原子吸收测定痕量金。根据实验得到的最佳分析条件,方法检出限（3S）为0.1ng/g,精密度（RSD,n=12）低于8.0%,经国家一级标准物质（GAu-2、GBW07243～GBW07248）分析验证,结果与标准值相符。
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| 关 键 词： | 石墨炉 地球化学样品 金 |
Determination of Trace Amount of Gold in Geochemical Exploration Samples by GFAAS |
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| MA Jian-xue,XU Zhuo,LIU Qing-chang,LU Xue-dong.Determination of Trace Amount of Gold in Geochemical Exploration Samples by GFAAS[J].Science and Technology of West China,2009,8(33):37-39,72. |
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| Authors: | MA Jian-xue XU Zhuo LIU Qing-chang LU Xue-dong |
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| Institution: | (No. 1 Gold Geological Detachment of Chinese People＇s Armed Police Force,Heilongjiang 157021,China) |
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| Abstract: | The geochemical exploration sample was roasted and dissolved with aqua regia （1＋1）.Trace gold is adsorbed by polyurethane foam with 10%～ 15% aqua regia in the presence of ferric chloride and released in 10g/L thiourea-hydrochloric acid solution. Au is determined by Z-2000 graphite furnace atomic absorption spectrometry （GFAAS）. The detection limit of the method is 0.1 ng/g and the precision （n=12） is 8.0%. The method has been applied to the determination of trace gold in geological standard reference samples and the results are in good agreement with certified values. |
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| Keywords: | Graphite furnace Geochemical exploration sample Gold |
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