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| 气相色谱-火焰光度法测定土壤中有机磷农药残留 |
| Research on Organophosphorus Pesticide Residues in Soil by GC-FPD |
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| DOI： |
| 中文关键词: 有机磷 农药残留 气相色谱法 土壤 |
| 英文关键词: Organophosphorus Pesticides residues Gas chromatography Soils |
| 基金项目: |
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| 摘要点击次数: 1155 |
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| 中文摘要: |
| 土壤样品用正己烷-丙酮（体积比为1〖JP20〗∶〖JP〗1）混合溶液提取，配合硅胶小柱净化，用乙酸乙酯洗脱，再用气相色谱-火焰光度法测定待测液中14种有机磷农药残留，方法在0.100 mg/L～1.00 mg/L范围内线性良好，当取样量为10 g时，方法检出限为1.3 μg/kg～2.3 μg/kg。用该方法测定有机磷的有证标准溶液，结果均在保证值范围内，RSD为2.2%～6.7%。实际土壤样品的13种有机磷农药加标回收率为59.2%～125%（敌百虫除外），敌百虫回收率为0，说明目标物在测定过程中被降解，该方法不适用于敌百虫的测定。 |
| 英文摘要: |
| A method was established for detection of 14 organophosphorus pesticide residues in soil by GC FPD. Samples were extracted by n hexane: acetone (1〖JP20〗∶〖JP〗1), followed by silica gel column cleanup with ethyl acetate as elution solvent. The method showed good linearity in the concentration range of 0.100 mg/L～1.00 mg/L. The detection limits were 1.3 μg/kg ~2.3 μg/kg when the sampling weight was 10 g. A certified standard solution of organophosphorus pesticides was determined by this method, the results were within the guarantee values and the RSDs were 2.2%～6.7%. The spiked recoveries of 13 organophosphorus pesticides in soil were between 59.2% and 125%, but the recovery rate of trichlorfon was zero, which indicated that degradation happened in the process. So the method was not suitable for the determination of trichlorfon. |
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