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| Determination of 14 elements in human nails by graphite digestion-inductively coupled plasma mass spectrometry |
| Received:August 16, 2021 Revised:February 10, 2022 |
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| DOI：10.3969/j.issn.2095-1035.2022.03.008 |
| KeyWord:heavy metal; human fingernail;graphite digestion;ICP-MS |
| Author | Institution |
| sunqi |
中国疾病预防控制中心环境与健康相关产品安全所 |
| LIN Xiao |
中国疾病预防控制中心 环境与健康相关产品安全所 |
| DING Liang |
中国疾病预防控制中心 环境与健康相关产品安全所 |
| ZHENG Lei |
中国疾病预防控制中心 环境与健康相关产品安全所 |
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| Abstract: |
| In order to achieve full and efficient digestion purposes，to determine the concentrations of 14 elements in fingernails and hair samples by inductively coupled plasma mass spectrometry (ICP-MS) with graphite digestion. The human fingernails were digested with concentrated nitric acid in a graphite furnace under the temperature 110℃ then diluted 50 times. Under the corresponding standard series, similar internal standard elements were selected according to the atomic mass of different elements, and the concentration of the corresponding elements was calculated. Evaluate the methodological characteristics of this method, such as linearity of standard curve, precision, standard recovery experiment, reference of quality control substance, etc. The standard curves of 14 elements in human fingernail samples have a good linearity (R2=0.999). The total CV range was 0.58%—6.7%. The recoveries were in the range of 80.8%~113%.This method was used to detect that hair similar to fingernails had certification control, and the test results were all within the standard value range of the certificate.The method has the advantages of sufficient sample digestion, high safety, good correlation of standard curve, wide linear range, many metal elements detected, and good precision and accuracy. |
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