气相色谱-质谱法测定苹果中多效唑残留量  

Determination of Paclobutrazol in Apple with Gas Chromatography-Mass Spectrometry

作　　者：白桦[1] 邱月明[1] 张青[1] 

机构地区：[1]中国检验检疫科学研究院,北京100025

出　　处：《分析测试学报》2005年第4期64-66,共3页Journal of Instrumental Analysis

摘　　要：苹果样品中的多效唑用丙酮-乙酸乙酯提取,弗罗里硅土柱净化后,用气相色谱-质谱电子轰击源正离子方式进行测定,外标法定量.通过监测离子的相对丰度对阳性结果进行确证.空白苹果样品中添加量在0.02～0.5mg/kg范围时,回收率达到90%～98%,相对标准偏差5.0%～8.6%,检出限为0.02 mg/kg.Paclobutrazol was extracted fromapple samples with acetone/acetic acetate.After solvent evapora-tion,the residue was dissolved in acetone/n-hexane and cleaned up by Florisil column.The elution was con-centrated and the residue was redissolved in n-hexane.The selected ion monitoring mode(ions selected:125,167and236)was used for the measurement of paclobutrazol.When the concentration of paclobutrazol in apple sample was in the range of0.020-0.50mg/kg,the recoveries were90%-98%with relative stan-dard deviations of5.0%-8.6%.There is a good linear correlation(the correlation coefficient was greater than0.999)between the peak areas and concentrations of paclobutrazol between0.05and5.0mg/kg.The limit of detection was0.02mg/kg.

关 键 词：气相色谱-质谱 多效唑 苹果 

分 类 号：O657.63[理学—分析化学] S482.8[理学—化学]