| 微波消解-GFAAS法测定菠菜粉和蘑菇粉中微量镉的研究 |
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| 引用本文： | 张玲帆,陶卫,张磊.微波消解-GFAAS法测定菠菜粉和蘑菇粉中微量镉的研究[J].化学分析计量,2010,19(4):32-34. |
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| 作者姓名： | 张玲帆 陶卫 张磊 |
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| 作者单位： | 华东理工大学分析测试中心,上海,200237 |
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| 摘 要： | 应用微波消解-石墨炉原子吸收光谱法对菠菜粉和蘑菇粉中微量镉的含量进行测定。菠菜粉和蘑菇粉经HNO3+H2O2微波消解体系消解后,采用磷酸二氢铵作为基体改进剂,灰化温度为900℃,原子化温度为1 350℃,镉含量在0~2 ng/mL范围内与吸光度呈线性关系,线性相关系数为0.999 4,检出限为0.02 mg/kg。该法测定结果的相对标准偏差小于4%(n=6),加标回收率为96.7%~103.2%。
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| 关 键 词： | 微波消解 石墨炉原子吸收光谱法 菠菜粉 蘑菇粉 镉 |
DETERMINATIONOFCADMIUM CONTENTINSPINAGEPOWDERANDMUSHROOMPOWDERBY GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY WITH MICROWAVE DIGESTION |
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| Zhang Lingfan,Tao Wei,Zhang Lei.DETERMINATIONOFCADMIUM CONTENTINSPINAGEPOWDERANDMUSHROOMPOWDERBY GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY WITH MICROWAVE DIGESTION[J].Chemical Analysis And Meterage,2010,19(4):32-34. |
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| Authors: | Zhang Lingfan Tao Wei Zhang Lei |
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| Institution: | ( Research Center of Analysis and Testing, East China University of Science and Technology, Shanghai 200237, China) |
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| Abstract: | A method of graphite furnace atomic absorption spectrometry with microwave digestion was applied to determination of cadmium content in spinage powder and mushroom powder. The samples were digested by closed - vessel microwave HNO3 ＋ H2O2 digestion system. NH4H2PO4 was used as the matrix modifier. Ashing temperature and atomic temperature were 900℃, 1 350℃, respectively. The calibration curve was linear over the concentration ranges of 0 - 2 ng/mL with the correlation coefficient of 0. 999 4. The detection limit was 0. 166 ng/mL, and the relative standard deviations （RSDs） were no more than 4%. Recovery of spiked samples was 96.7% - 103.2%. |
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| Keywords: | microwave digestion GF- AAS spinage powder mushroom powder cadmium |
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