| 摘要: |
| 从提取液对测定结果的影响、消解方法对测定结果的影响和提取效率3个方面，对碳酸氢铵二乙烯三胺五乙酸（AB-DTPA）法和氯化钙-二乙烯三胺五乙酸（CaCl2-DTPA）法提取、电感耦合等离子体发射光谱（ICP-OES）法测定土壤中有效态As、V和Cr的优缺点进行了对比，结果表明：AB-DTPA法比CaCl2-DTPA法提取效率更高。用ICP-OES法测定AB-DTPA法提取有效态As、V和Cr，检出限为0.007~0.019 mg/kg，加标回收率为95.0%~119.0%，相对标准偏差为2.42%~6.30%。该方法快速高效、灵敏度高、准确度和精密度好，实现了多元素同时提取，方法适用性广泛。 |
| 关键词: 土壤 有效态 砷 钒 铬 碳酸氢铵-二乙烯三胺五乙酸 氯化钙-二乙烯三胺五乙酸 |
| DOI： |
| 分类号:X833；O658 |
| 文献标识码:B |
| 基金项目: |
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| Comparative Study of Two Methods on Extraction of As, V and Cr in Soil |
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TANG Ai-ling
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Shanghai Environmental Monitoring Center,Shanghai 200235,China
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| Abstract: |
| Two methods of AB-DTPA and CaCl2- DTPA on extraction of elements As, V and Cr in soil were compared in details in three aspects,including matrix effects,digestion and extraction efficiency.The results showed that,the AB-DTPA extraction method was better than CaCl2-DTPA extraction method.When determined by ICP-OES,the detection limits were 0.007 ~ 0.019 mg/kg.The recovery rates of soil samples were 95.0%~119.0%,and the relative standard deviations were 2.42%~6.30%.This method was quick and efficient with high sensitivity,accuracy and precision.It enables multiple elements to be simultaneously extracted,which expands the scope of its application. |
| Key words: Soil Available form As V Cr AB-DTPA CaCl2-DTPA |
