【引用本文】 王辉, 汪方跃, 关炳庭, 等. 激光能量密度对LA-ICP-MS分析数据质量的影响研究[J]. 岩矿测试, 2019, 38(6): 609-619. doi: 10.15898/j.cnki.11-2131/td.201903010029
WANG Hui , WANG Fang-yue , GUAN Bing-ting , et al. Effect of Laser Energy Density on Data Quality during LA-ICP-MS Measurement[J]. Rock and Mineral Analysis, 2019, 38(6): 609-619. doi: 10.15898/j.cnki.11-2131/td.201903010029

激光能量密度对LA-ICP-MS分析数据质量的影响研究

1. 岩石圈演化国家重点实验室, 中国科学院地质与地球物理研究所, 北京 100029;

2. 合肥工业大学资源与环境工程学院, 安徽 合肥 230009;

3. 中国科学院大学, 北京 100049;

4. 矿床成因与勘查技术研究中心, 合肥工业大学, 安徽 合肥 230009;

5. 云南金长江矿业有限公司, 广东 肇庆 526300;

6. 中国科学院广州地球化学研究所, 广东 广州 510640

收稿日期: 2019-03-01  修回日期: 2019-05-24 

基金项目: 国家重点研发计划“深地资源勘查开采”重点专项(2016YFC0600404,2016YFC0600206);国家自然科学基金项目(41873034,41673021);中央科研基本业务费(PA2018GDQT0020);合肥工业大学国家级大学生创新创业训练计划项目(201610359059)

作者简介: 王辉,学士,地球化学专业。E-mail:wanghui187@mails.ucas.ac.cn。。

Effect of Laser Energy Density on Data Quality during LA-ICP-MS Measurement

1. State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;

2. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China;

3. University of Chinese Academy of Science, Beijing 100049, China;

4. Ore Deposit and Exploration Centre, Hefei University of Technology, Hefei 230009, China;

5. Yunnan Jinchangjiang Mine Industry Co., LTD, Zhaoqing 526300, China;

6. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China

Received Date: 2019-03-01
Revised Date: 2019-05-24

摘要:LA-ICP-MS分析矿物元素含量时激光能量密度会影响样品的剥蚀速率,从而影响测试过程的信号强度。激光能量密度变化对测试数据精确度的影响,以及不同天然矿物对激光能量密度的响应尚需进一步明确。本文测定了不同莫氏硬度天然矿物可稳定剥蚀的最小激光能量密度,评估了193nm ArF准分子激光系统中能量密度对地质标准样品(NIST SRM614、USGS BCR-2G、USGS GSC-1G)和天然矿物测试数据质量的影响。研究结果表明:①稳定剥蚀石英和萤石所需的最小激光能量密度为~5J/cm2,低于前人的报道值(~10J/cm2),而稳定剥蚀其他矿物(如滑石、磷灰石、刚玉等)所需的最小能量密度一般在1~2J/cm2;②不同激光能量密度剥蚀条件下,标准样品中大部分微量元素测试结果与推荐值的相对误差优于~20%,相对标准偏差(RSD)优于~10%,而天然矿物中含量>1μg/g的大部分微量元素测试数据的RSD优于~20%;③在一定范围内,激光能量密度越大,数据平均相对误差越小,整体质量更好。

关键词: LA-ICP-MS, 激光能量密度, 标准样品, 天然矿物, 数据质量

Effect of Laser Energy Density on Data Quality during LA-ICP-MS Measurement

KEY WORDS: LA-ICP-MS, laser energy density, standard samples, natural minerals, data quality

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激光能量密度对LA-ICP-MS分析数据质量的影响研究

王辉, 汪方跃, 关炳庭, 盛兆秋