【引用本文】 徐进力, 邢夏, 唐瑞玲, 等. 动能歧视模式ICP-MS测定地球化学样品中14种痕量元素[J]. 岩矿测试, 2019, 38(4): 394-402. doi: 10.15898/j.cnki.11-2131/td.201812070131
XU Jin-li , XIING Xia , TANG Rui-ling , et al. Determination of 14 Trace Elements in Geochemical Samples by ICP-MS Using Kinetic Energy Discrimination Mode[J]. Rock and Mineral Analysis, 2019, 38(4): 394-402. doi: 10.15898/j.cnki.11-2131/td.201812070131

动能歧视模式ICP-MS测定地球化学样品中14种痕量元素

1. 中国地质科学院地球物理地球化学勘查研究所, 河北 廊坊 065000;

2. 联合国教科文组织全球尺度地球化学国际研究中心, 河北 廊坊 065000

收稿日期: 2018-12-07  修回日期: 2019-03-17 

基金项目: 中央级公益性科研院所基本科研业务费专项资金(AS2015J12);中国地质调查局地质调查项目专项资金(DD20190518)

作者简介: 徐进力,硕士,高级工程师,主要从事地球化学样品配套分析方法的研究。E-mail:80368070@qq.com。。

Determination of 14 Trace Elements in Geochemical Samples by ICP-MS Using Kinetic Energy Discrimination Mode

1. Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China;

2. International Centre on Global-Scale Geochemistry, United Nations Educational-Scientific and Cultural Organization, Langfang 065000, China

Received Date: 2018-12-07
Revised Date: 2019-03-17

摘要:应用传统ICP-MS法测定勘查地球化学样品中Ag、Cd等痕量元素,基体效应和多原子离子干扰严重,准确测定的难度较大。本文基于当前ICP-MS消除干扰技术,分析了ICP-MS标准模式(STD)及动能歧视模式(KED)测定地球化学样品中Ag、Cd等14种痕量元素的有效性,通过比较这两种模式的测定效果,在此基础上确定了各元素的有效测定模式。结果表明:在KED模式下,基体元素如Zr、Nb氧化物的产率降低,基本上消除了Zr、Nb氧化物对痕量元素Ag、Cd的多原子离子干扰。KED模式提高了信噪比,降低了方法检出限,如Ag、Cd的检出限分别为0.004mg/kg、0.005mg/kg,其他12种元素的检出限也低于多目标地球化学调查76种元素分析方案中的检出限。测定痕量元素的准确度显著优于STD模式。实验中采用简单的硝酸-氢氟酸-高氯酸消解样品,残渣用王水复溶,结合KED模式下优选出干扰较小的同位素作为测定同位素,以Rh作为内标校正仪器产生的信号漂移,将样品溶液稀释至1000倍,基体效应降低至最小。本方法经国家一级标准物质的验证,测定结果与认定值相符,可为勘查地球化学提供高质量数据。

关键词: 岩石, 土壤, 水系沉积物, , , 酸溶, 电感耦合等离子体质谱法, 动能歧视模式

Determination of 14 Trace Elements in Geochemical Samples by ICP-MS Using Kinetic Energy Discrimination Mode

KEY WORDS: rock, soil, sediment, silver, cadmium, acid dissolution, Inductively Coupled Plasma-Mass Spectrometry, kinetic energy discrimination

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动能歧视模式ICP-MS测定地球化学样品中14种痕量元素

徐进力, 邢夏, 唐瑞玲, 胡梦颖, 张鹏鹏, 白金峰, 张勤