黑色岩系中贵金属八元素同时测定  

Simultaneous Determination of Eight Precious Metal Elements in Black Rock Samples

作　　者：闫红岭[1] 李志伟[1] 王敏捷[1] 王君玉[1] 袁润蕾[1] 李杰[1] YAN Hongling;LI Zhiwei;WANG Minjie;WANG Junyu;YUAN Runlei;LI Jie(Key Lab of Ministry of Land and Resources Analysis and Exploration of Precious Metals, Henan Rock Mineral Testing Centers, Zhengzhou 450012)

机构地区：[1]河南省岩石矿物测试中心国土资源部贵金属分析与勘查技术重点实验室,郑州450012

出　　处：《贵金属》2016年第3期66-71,共6页Precious Metals

基　　金：国土资源部公益性行业专项(200911043-2)

摘　　要：黑色岩中含有大量有机碳，贵金属元素又呈超微细分散状态，难以识别，传统的镍锍试金方法难于测定。以锡作捕集剂，通过调整试金配料，提高熔融温度，增加助熔剂和覆盖剂等方式，建立了锡试金富集—ICP-MS法同时测定黑色岩中8个贵金属元素的方法。方法检出限(ng/g)为：Ag27.8，Au、Pd0.11，Pt0.10，Rh、Ru、Ir、Os均为0.02；各元素的回收率为88%~120%，可用于黑色岩系及其它岩石矿物中贵金属元素的测定。The precious metal elements are difficult both to be identified and to be determined by conventional nickel sulphide fire-assay because the black rock contains large amounts of organic carbon and these elements are existed as ultrafine dispersion. A method to determine eight precious metal elements simultaneously by ICP-MS after enrichment with tin fire-assay was reported. Tin was used as the scavenger. The assay ingredients were adjusted to elevate the melting temperature. The flux and covering agent were added. Based on the determination results, the detection limits (ng/g) were 27.8 for Ag, 0.11 for Au and Pd, 0.10 for Pt, and 0.02 for Rh, Ru, Ir and Os. The recovery rate ranged 88%~120%. It can be applied to the determination of precious metal elements in black rock and other minerals samples.

关 键 词：分析化学 黑色岩 贵金属 锡试金 电感耦合等离子体质谱(ICP-MS) 

分 类 号：O657.63[理学—分析化学]