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| Determination of 13 Elements in Soil by Ultra-microwave Digestion Coupled with Inductively Coupled Plasma Mass Spectrometry |
| Received:June 22, 2021 Revised:August 24, 2021 |
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| DOI：10.3969/j.issn.2095-1035.2021.05.001 |
| KeyWord:soil; elements; ultra-microwave digestion; inductively coupled plasma mass spectrometry |
| Author | Institution |
| Lan Guanyu |
中国农业科学院农业质量标准与检测技术研究所 农业农村部农产品质量安全重点实验室 |
| Li ying |
杭州谱育科技发展有限公司 |
| Yu Xiaofeng |
杭州谱育科技发展有限公司 |
| Wang Zhaohui |
吉林农业大学 |
| Mao Xuefei |
中国农业科学院农业质量标准与检测技术研究所 农业农村部农产品质量安全重点实验室 |
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| Abstract: |
| In order to accurately and efficiently detect 13 elements in soil, such as vanadium, chromium, manganese, cobalt, nickel, copper, zinc, arsenic, strontium, molybdenum, antimony, thallium, lead and uranium, a method of ultra-microwave digestion inductively coupled plasma mass spectrometry (ICP-MS) was developed in this study. The acid system and heating time of ultra-microwave digestion were optimized, and then the digestion effect and detection results were compared with conventional microwave digestion. Under optimal conditions, the method limits of detections (LODs) and limits of quantitation (LOQs) of 13 elements were 0.0002-0.2 mg/kg and the 0.001-0.6 mg/kg, respectively. The multi-elemental results of ICP-MS determination showed a favorable agreement with that of the established method with regression coefficients (R2) 0.9996-1.0000 in the range of 0-500 μg/L; the spiked recoveries were 76.3%~126%, proving an acceptable accuracy for the simultaneous determination of 13 elements in complex soil matrices. This ultra-microwave digestion instrumentation enables 18-samples preparation for one time with the advantages of safety, efficiency, less acid consumption and environmental friendliness vs. the conventional digestion methods. Therefore, this proposed method can provide a reliable analysis tool for the identification of soil heavy metal pollution. |
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