| 电感耦合等离子体质谱法测定灌木枝叶中微量元素的样品预处理方法研究 |
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| 引用本文： | 林伟龙,王正海,王娟,蒋丽怡,范朝焰.电感耦合等离子体质谱法测定灌木枝叶中微量元素的样品预处理方法研究[J].岩矿测试,2015,34(4):430-435. |
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| 作者姓名： | 林伟龙 王正海 王娟 蒋丽怡 范朝焰 |
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| 作者单位： | 中山大学地球科学与地质工程学院, 广东 广州 510275,中山大学地球科学与地质工程学院, 广东 广州 510275;广东省地质过程与矿产资源探查重点实验室, 广东 广州 510275,中山大学地球科学与地质工程学院, 广东 广州 510275,中山大学地球科学与地质工程学院, 广东 广州 510275,中国科学院边缘海地质重点实验室, 中国科学院南海海洋研究所, 广东 广州 510301 |
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| 摘 要： | 利用电感耦合等离子体质谱法(ICP-MS)测定植物样品中微量元素的关键技术是消除植物样品的有机基体效应,本文通过预处理方法中的酸消解体系、称样量和消解方式消除其影响。以国家标准物质灌木枝叶组合样(GBW07603)为材料进行研究,对比分析了硝酸-过氧化氢、硝酸-氢氟酸、硝酸-氢氟酸-过氧化氢3种酸溶体系的消解效果,以确定最佳酸溶体系,进而定量研究2种称样量(50 mg和100 mg)和3种消解方式(密封高压二次消解、密封高压一次消解、微波消解)的消解效果,并以In作为内标采用ICP-MS测定微量元素含量。结果表明:硝酸-氢氟酸-过氧化氢酸溶体系的消解效果最好;50 mg的测定值更接近于参考值;微波消解法的测定值明显偏低,而密封高压二次消解法是灌木枝叶样品预处理的有效方法。
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| 关 键 词： | 灌木枝叶 微量元素 酸溶体系 称样量 消解方式 电感耦合等离子体质谱法 |
| 收稿时间： | 2014/8/23 0:00:00 |
| 修稿时间： | 2015/6/25 0:00:00 |
Sample Pretreatment Methods for Determination of Trace Elements in Plant by Inductively Coupled Plasma-Mass Spectrometry |
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| LIN Wei-long,WANG Zheng-hai,WANG Juan,JIANG Li-yi and FAN Chao-yan.Sample Pretreatment Methods for Determination of Trace Elements in Plant by Inductively Coupled Plasma-Mass Spectrometry[J].Rock and Mineral Analysis,2015,34(4):430-435. |
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| Authors: | LIN Wei-long WANG Zheng-hai WANG Juan JIANG Li-yi and FAN Chao-yan |
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| Institution: | School of Earth Science and Geological Engineering, Sun Yat-Sen University, Guangzhou 510275, China,School of Earth Science and Geological Engineering, Sun Yat-Sen University, Guangzhou 510275, China;Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes, Guangzhou 510275, China,School of Earth Science and Geological Engineering, Sun Yat-Sen University, Guangzhou 510275, China,School of Earth Science and Geological Engineering, Sun Yat-Sen University, Guangzhou 510275, China and Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China |
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| Abstract: | The key of determining trace elements in plant by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) is to eliminate the organic matrix effect. In this study, the improvement of acid digesting system, digestion method and sample weight has solved the matrix effect. Digestion results are evaluated by digesting Certified Reference Material (GBW07603) with HNO3-H2O2, HNO3-HF and HNO3-HF-H2O2. Different sample weights, including 50 mg and 100 mg, and digestion methods including twice-sealed high pressure digestion, once-sealed high pressure digestion and microwave-assisted digestion are evaluated. Trace elements were analyzed by ICP-MS with In as the internal standard element. Experimental results show that HNO3-HF-H2O2 is the best digestion reagent for plants and 50 mg sample has the least matrix effect. The trace element contents for microwave-assisted digestion are obviously lower than the real values. Twice-sealed high pressure digestion was an efficient method for digesting plants. |
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| Keywords: | bush branche and leave samples trace elements acid digestion system sampling weight digestion method Inductively Coupled Plasma-Mass Spectrometry |
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