| 石墨炉原子吸收光谱法测定大米中微量镉 |
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| 引用本文： | 石欣,王彩艳,赵银宝,单巧玲,张锋锋.石墨炉原子吸收光谱法测定大米中微量镉[J].宁夏农林科技,2014(10):46-48. |
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| 作者姓名： | 石欣 王彩艳 赵银宝 单巧玲 张锋锋 |
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| 作者单位： | 宁夏农林科学院农产品质监中心,宁夏 银川,750002 |
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| 基金项目： | 宁夏农林科学院院自主研发项目。 |
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| 摘 要： | 采用湿法消解处理大米样品、磷酸氢二铵为基体改进剂、石墨炉原子吸收光谱法测定大米中镉的含量,实验确定了最佳基体改进剂浓度为2%,最佳灰化温度为400℃。此方法的线性范围为0~5.0μg/L(R=0.999 6),加标回收率为96.1%~101.7%,RSD为2.44%~3.98%(n=4)。该方法准确度和精密度高,可为宁夏大米的检测认证提供数据。
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| 关 键 词： | 石墨炉原子吸收光谱法 湿法消解 大米 镉 |
Determination of Cadmium in Rice by GF-AAS |
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| Institution: | Sill Xin oI al. (Agricultural Products Quality Supervision Center, Ningxia Academy of Agriculture and Forestry Sciences, Yinehuan, Ningxia 750002) |
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| Abstract: | The wet digestion was used in processing of rice samples, ammonium dibasic phosphate was used as the substrate modifier agent and then the GF-AAS was used to measure the content of cadmium in rice. It was determined by the exper-iment that the optimal substrate modifier agent concentration should be 2% and the best ashing temperature should be 400℃. The linear range of the method was 0-5.0 μg/L（ =0.999 6）, the recovery of standard addition was 96.1%~101.7% and the RSD was 2.44%~3.98%（ =4）. The degree of accuracy and precision of this method is high and it can provide data for determination of cadmium in Ningxia rice. |
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| Keywords: | GF-AAS Wet digestion Rice Cadmium |
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