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| Comparison of Different Pretreatment Methods on Determination of Six Metallic elements in Soil by Inductively Coupled Plasma Mass Spectrometry |
| Received:June 05, 2023 Revised:December 09, 2023 |
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| DOI：10.3969/j.issn.2095-1035.2024.04.002 |
| KeyWord:Pretreatment method; Inductively coupled plasma mass spectrometry; Soil; Metallic elements |
| Author | Institution |
| YAO Su-zhi |
广西壮族自治区生态环境监测中心 |
| CHEN Chun-fei |
广西壮族自治区生态环境监测中心 |
| LU Qiu |
广西壮族自治区生态环境监测中心 |
| LIANG Xiao-xi |
广西壮族自治区生态环境监测中心 |
| HONG Xin |
广西壮族自治区生态环境监测中心 |
| Yin Juan |
广西财经学院管理科学与工程学院 |
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| Abstract: |
| Sample pretreatment is a key step in the determination of metallic elements in soil. In order to ensure that the determination results can accurately reflect the soil environment conditions, the simultaneous extraction ability of six metal elements in soil by different pretreatment methods were compared. Based on inductively coupled plasma mass spectrometry technology, microwave digestion device and graphite digestion device were used for sample pretreatment to explore the effects of acid type, the mode of adding acid, digestion device, acid evaporation temperature on the determination of soil standard and actual sample results. The results showed that by adding hydrochloric acid, nitric acid, hydrofluoric acid, perchloric acid in sequence for digestion, controlling acid evaporation temperature 160℃, the six elements of copper, lead, zinc, cadmium, chromium and nickel in soil could be determined more quickly and accurately with graphite digestion. The pretreatment time was about 8.5 h, and the digestion cost is lower than microwave digestion. Under the optimized test conditions, the recovery rate of six metallic elements in soil standard samples is 91.5%~108%. The relative standard deviation is 0.8%~ 5.4%. The detection limit of the method is 0.02 mg/kg ~2 mg/kg. The method has the advantages of high sensitivity, good accuracy and precision, which is suitable to analyze large quantities of samples. |
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