| 不同金锡合金中金含量的火试金测定 |
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| 引用本文： | 曾荷峰,金娅秋,甘建壮,鲁瑞智,付仕梅,杨辉,杨梅英,钱彦林. 不同金锡合金中金含量的火试金测定[J]. 贵金属, 2019, 40(S1): 130-133 |
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| 作者姓名： | 曾荷峰 金娅秋 甘建壮 鲁瑞智 付仕梅 杨辉 杨梅英 钱彦林 |
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| 作者单位： | 贵研铂业股份有限公司 稀贵金属综合利用新科技术国家重点实验室，贵研检测科技云南有限公司，昆明 650106,贵研铂业股份有限公司 稀贵金属综合利用新科技术国家重点实验室，贵研检测科技云南有限公司，昆明 650106,贵研铂业股份有限公司 稀贵金属综合利用新科技术国家重点实验室，贵研检测科技云南有限公司，昆明 650106,贵研铂业股份有限公司 稀贵金属综合利用新科技术国家重点实验室，贵研检测科技云南有限公司，昆明 650106,贵研铂业股份有限公司 稀贵金属综合利用新科技术国家重点实验室，贵研检测科技云南有限公司，昆明 650106,贵研铂业股份有限公司 稀贵金属综合利用新科技术国家重点实验室，贵研检测科技云南有限公司，昆明 650106,贵研铂业股份有限公司 稀贵金属综合利用新科技术国家重点实验室，贵研检测科技云南有限公司，昆明 650106,贵研铂业股份有限公司 稀贵金属综合利用新科技术国家重点实验室，贵研检测科技云南有限公司，昆明 650106 |
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| 摘 要： | 当金锡合金中锡含量超过35%，直接进行灰吹时，金、银合粒松散，不聚珠，灰皿中存在灰吹残留渣，导致火试金测定结果偏低。对高含量样品，研究采用熔炼-灰吹的操作可去除锡干扰，得到完整的合粒。对不同含量的样品宜选择不同的分金硝酸浓度。根据不同含量采用不同的操作步骤，测定金锡合金中金的加标回收率为99.74%~100.27%，方法精密度(RSD)为0.021%~0.127%。
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| 关 键 词： | 分析化学；火试金；金锡合金；含锡量；熔炼-灰吹；分金 |
| 收稿时间： | 2019-08-19 |
Determination of Gold Content by Fire Assay in Different Au-Sn Alloy |
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| ZENG Hefeng,JIN Yaqiu,GAN Jianzhuang,LU Ruizhi,FU Shimei,YANG Hui,YANG Meiying and QIAN Yanlin. Determination of Gold Content by Fire Assay in Different Au-Sn Alloy[J]. Precious Metals, 2019, 40(S1): 130-133 |
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| Authors: | ZENG Hefeng JIN Yaqiu GAN Jianzhuang LU Ruizhi FU Shimei YANG Hui YANG Meiying QIAN Yanlin |
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| Affiliation: | State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Sino-Platinum Metals Co. Ltd., Guiyan Detection Technology Yunnan Co. Ltd., Kunming 650106, China,State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Sino-Platinum Metals Co. Ltd., Guiyan Detection Technology Yunnan Co. Ltd., Kunming 650106, China,State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Sino-Platinum Metals Co. Ltd., Guiyan Detection Technology Yunnan Co. Ltd., Kunming 650106, China,State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Sino-Platinum Metals Co. Ltd., Guiyan Detection Technology Yunnan Co. Ltd., Kunming 650106, China,State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Sino-Platinum Metals Co. Ltd., Guiyan Detection Technology Yunnan Co. Ltd., Kunming 650106, China,State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Sino-Platinum Metals Co. Ltd., Guiyan Detection Technology Yunnan Co. Ltd., Kunming 650106, China,State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Sino-Platinum Metals Co. Ltd., Guiyan Detection Technology Yunnan Co. Ltd., Kunming 650106, China and State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Sino-Platinum Metals Co. Ltd., Guiyan Detection Technology Yunnan Co. Ltd., Kunming 650106, China |
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| Abstract: | When the content of tin in the gold tin alloy is more than 35%, the gold and silver grains are loose and not agglomerated, and there is residual slag in the ash dish, which results in the low result of fire assay. For high content samples, the operation of smelting soot blowing can remove the interference of tin. The complete zygote was obtained. Different concentration of gold and nitric acid should be selected for different samples. Different operation steps were adopted according to different samples. The recovery of gold in gold tin alloy was 99.74%~100.27%, and the precision of the method (RSD) was 0.021%~0.127%. |
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| Keywords: | analytic chemistry fire assay Au-Sn alloy Sn content melt-blowing in ash gold partition |
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