| 微波消解-火焰原子吸收光谱法测定硅石中微量铁锰钙镁 |
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| 引用本文： | 郑凤英,李顺兴,林路秀,黄艺娟,王桂林,钱沙华.微波消解-火焰原子吸收光谱法测定硅石中微量铁锰钙镁[J].分析科学学报,2009,25(4). |
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| 作者姓名： | 郑凤英 李顺兴 林路秀 黄艺娟 王桂林 钱沙华 |
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| 作者单位： | 1. 漳州师范学院化学与环境科学系,福建漳州,363000
2. 武汉大学环境科学系,湖北武汉,430074 |
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| 摘 要： | 本文提出硅石消解新技术--微波消解法.于聚氯乙烯消解罐中加硝酸、氢氟酸、高氯酸,程序加压升温分解硅石.微波消解法与冰浴法、加热消解法相比,可避免待测元素在分解过程带来的损失,且分解完全,酸用量少,操作简单、可靠.硅石经微波消解后采用火焰原子吸收光谱法检测铁、锰、镁、钙,铁、锰、镁、钙的回收率分别为97.3%～99.0%、104.4%～106.5%、95.7%～98.0%、103.1%～106.6%,与国家标准方法分析结果比较,相对误差均小于5%.
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| 关 键 词： | 微波消解 火焰原子吸收光谱法 微量元素 硅石 |
Determination of Iron,Manganese,Magnesium and Calcium in Silica by Flame Atomic Absorption Spectrometry after Microwave Digestion |
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| ZHENG Feng-ying,LI Shun-xing,LIN Lu-xiu,HUANG Yi-juan,WANG Gui-lin,QIAN Sha-hua.Determination of Iron,Manganese,Magnesium and Calcium in Silica by Flame Atomic Absorption Spectrometry after Microwave Digestion[J].Journal of Analytical Science,2009,25(4). |
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| Authors: | ZHENG Feng-ying LI Shun-xing LIN Lu-xiu HUANG Yi-juan WANG Gui-lin QIAN Sha-hua |
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| Institution: | ZHENG Feng-ying1,LI Shun-xing1,LIN Lu-xiu1,HUANG Yi-juan1,WANG Gui-lin,QIAN Sha-hua2(1.Department of Chemistry and Environmental Science,Zhangzhou Normal University,Zhangzhou 363000,2.Department of Environmental Science,Whuhan University,Whuhan 430072) |
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| Abstract: | Compared with mixed acid digestion using ice bath or heating,microwave digestion as a new digestion technique was proposed.The digested reagents,including 4.00 mL nitric acid,1.00 mL hydrofluoric acid and 0.50 mL perchloric acid,were added to digest 0.2 g silica;then the microwave digestion system was adjusted as follows: 10 atm for 5 min,15 atm for 5 min,and 20 atm for 5 min.This microwave digestion has advantages of avoiding the lost of trace element,decomposing completely,less dosage of acid and easy ope... |
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| Keywords: | Microwave digestion Flame atomic absorption spectrometry Trace elements Silica |
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