| 聚氨酯泡塑富集硫脲解脱-石墨炉原子吸收光谱法测定地质样品中金铂 |
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| 引用本文： | 刘向磊,文田耀,孙文军,姚维利,王腾飞,吴俊文.聚氨酯泡塑富集硫脲解脱-石墨炉原子吸收光谱法测定地质样品中金铂[J].岩矿测试,2013,32(4):576-580. |
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| 作者姓名： | 刘向磊 文田耀 孙文军 姚维利 王腾飞 吴俊文 |
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| 作者单位： | 河南省地矿局第一地质矿产调查院,河南洛阳,471023 |
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| 摘 要： | 泡沫塑料常用于富集常规地质样品中的铂族元素,而富集后往往用高温灰化法解脱,此法操作繁琐,温度过高易使铂配合物分解为王水难以提取的不溶性残渣,导致测试结果不稳定、效率低;单独使用20 g/L硫脲溶液解脱,测试结果的重现性差。本文对此方法进行改进,采用50%王水封闭溶解试样,氯化亚锡还原,聚氨酯泡塑富集,20 g/L硫脲-20%盐酸溶液解脱,石墨炉原子吸收光谱法测定金和铂。在盐酸-氯化亚锡体系中,吸附温度为20℃,振荡时间为30 min时,金和铂的回收率均在95%以上,金和铂的检出限分别为0.23 ng/g和0.39 ng/g,精密度(RSD,n=10)分别为1.8%～10.3%和1.3%～13.3%。经国家一级标准物质验证,测定值和标准值基本相符。该方法泡塑解脱时无需高温灰化,用王水多次提取,在100℃沸水浴中即可一次完成,样品处理快捷。与高温灰化法相比,提取温度大为降低,分析流程简单,显著提高了单次测样量,且干扰小、空白值低,可以满足除王水难溶的铂矿种外大部分地质样品快速测定的需要。
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| 关 键 词： | 地质样品 金 铂 泡塑富集 石墨炉原子吸收光谱法 |
| 收稿时间： | 2012/11/6 0:00:00 |
| 修稿时间： | 2013/1/31 0:00:00 |
Determination of Au and Pt in Geological Samples by Graphite Furnace Atomic Absorption Spectrometry with Concentrate and Extraction by Foam Plastics and Thiourea |
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| LIU Xiang-lei,WEN Tian-yao,SUN Wen-jun,YAO Wei-li,WANG Teng-fei and WU Jun-wen.Determination of Au and Pt in Geological Samples by Graphite Furnace Atomic Absorption Spectrometry with Concentrate and Extraction by Foam Plastics and Thiourea[J].Rock and Mineral Analysis,2013,32(4):576-580. |
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| Authors: | LIU Xiang-lei WEN Tian-yao SUN Wen-jun YAO Wei-li WANG Teng-fei and WU Jun-wen |
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| Institution: | The First Institute of Geological and Mineral Resources Survey, Hennan Province Geological Exploration Bureau, Luoyang 471023, China;The First Institute of Geological and Mineral Resources Survey, Hennan Province Geological Exploration Bureau, Luoyang 471023, China;The First Institute of Geological and Mineral Resources Survey, Hennan Province Geological Exploration Bureau, Luoyang 471023, China;The First Institute of Geological and Mineral Resources Survey, Hennan Province Geological Exploration Bureau, Luoyang 471023, China;The First Institute of Geological and Mineral Resources Survey, Hennan Province Geological Exploration Bureau, Luoyang 471023, China;The First Institute of Geological and Mineral Resources Survey, Hennan Province Geological Exploration Bureau, Luoyang 471023, China |
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| Abstract: | |
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| Keywords: | geological samples Au Pt foam plastics enrichment Graphite Furnace Atomic Absorption Spectrometry |
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