CAJ | 학술논문

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。
이용전감우합등리자체질보법（ ICP-MS）측정식물양품중미량원소적관건기술시소제식물양품적유궤기체효응，본문통과예처리방법중적산소해체계、칭양량화소해방식소제기영향。이국가표준물질관목지협조합양（GBW07603）위재료진행연구，대비분석료초산-과양화경、초산-경불산、초산-경불산-과양화경3충산용체계적소해효과，이학정최가산용체계，진이정량연구2충칭양량（50 mg화100 mg ）화3충소해방식（밀봉고압이차소해、밀봉고압일차소해、미파소해）적소해효과，병이In작위내표채용ICP-MS측정미량원소함량。결과표명：초산-경불산-과양화경산용체계적소해효과최호；50 mg적측정치경접근우삼고치；미파소해법적측정치명현편저，이밀봉고압이차소해법시관목지협양품예처리적유효방법。
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 HHO3-H2 O2,HHO3-HF and HHO3-HF-H2 O2. 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 HHO3-HF-H2 O2 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.