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| Determination of copper, lead, zinc, cadmium, chromium, nickel,arsenic in millet by inductively coupled plasma mass spectrometry withwith high-pressure microwave digestion |
| Received:August 22, 2022 Revised:September 09, 2022 |
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| DOI：doi:10.3969/j.issn.2095-1035.2023.05.003 |
| KeyWord:high-pressure microwave digestion; inductively coupled plasma mass spectrometry (ICP-MS);millet samplest; Cu、Pb、Zn、Cd、Cr、Ni、As |
| Author | Institution |
| bianpengsha |
河北省地质实验测试中心/河北省矿产资源与生态环境监测重点实验室 |
| zhangshuo |
河北省地质实验测试中心 |
| ancaixiu |
河北省地质实验测试中心/河北省矿产资源与生态环境监测重点实验室 |
| liuan |
河北省地质实验测试中心/河北省矿产资源与生态环境监测重点实验室 |
| lilongfei |
河北省地质实验测试中心 |
| songjuanjuan |
河北省地质实验测试中心 |
| liuxiaohui |
石家庄海关技术中心保定业务部 |
| liulili |
石家庄海关技术中心保定业务部 |
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| Abstract: |
| Accurate determination of heavy metals in millet is very important to control and improve food safety.The samples were treated by high-pressure microwave digestion in HF-H2O2 system. .A method for the determination of heavy metals in millet samples by electrical coupled plasma mass spectrometry(ICP-MS) has been developed.. 52Cr、60Ni、63Cu、66Zn、75As、111Cd、208Pb were selected as the measured isotopes. The isobaric interference of 111Cd 、52Cr、75As are corrected by the online calibration equation and collision/ reaction interface mode. The experimental condition optimized. . Under the optimized experimental conditions ,the correlation coefficient of the calibration curve is not less than 0.999, with the detection limit ranges from 0.0005 to 0.010 μg/g, and the low limit of determination from 0.002 to 0.40 μg/g. The proposed method was applied for the 12 times parallel determination of Cu、Pb、Zn、Cd、Cr、Ni in the composition analysis standard substances of millet, the water sediment, and the andesite rock. The analytical results were basically consistent with the certified values, with the relative standard deviations(RSD) less than7.0%. The millet samples of Yuxian were analyzed by experimental methods. The method has high sensitivity good reroducibility and accurate quantification,it can be used for the determination of large quantities of millet samples. |
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