论文部分内容阅读
通过优化提取溶剂和提取方式,确定土壤中的福美胂残留采用苯振荡离心一体提取,苹果用甲苯均质提取,采用高效液相色谱,建立了苹果和土壤中福美胂残留的直接检测方法。采用外标法定量,在0.1~5.0 mg/L范围内,具有良好的线性关系,相关系数为0.9996。当土壤中添加量为0.2~1.0 mg/kg时,回收率在86.0%~103.5%之间,RSD在2.9%~5.0%之间,定量限为0.1 mg/kg;当苹果中的添加量在0.3~2.0 mg/kg时,回收率在91.0%~95.2%范围内,RSD在1.4%~4.7%之间,定量限为0.3 mg/kg。方法应用于实际土壤和苹果样品的福美胂残留量检测,符合农药残留检测的要求。
By optimizing extraction solvent and extraction method, the determination of arsenic residues in soil by benzene oscillation centrifugation extraction, apple homogenization with toluene, using high performance liquid chromatography to establish direct detection of residues of arsenic in apple and soil. The external standard method was used for quantification. The correlation coefficient was 0.9996 in the range of 0.1-5.0 mg / L. The recoveries ranged from 86.0% to 103.5% with RSD ranging from 2.9% to 5.0% and the limit of quantification was 0.1 mg / kg when the soil was added at 0.2-1.0 mg / kg. The recoveries ranged from 91.0% to 95.2% at 0.3-2.0 mg / kg. The RSDs ranged from 1.4% to 4.7% with a limit of quantification of 0.3 mg / kg. The method was applied to the determination of arsenic residues in real soil and apple samples, which met the requirements of pesticide residue detection.