A β-cyclodextrin derivative, perbenzyl-β-cyclodextrin, was prepared and used as a chiral stationary phase for capillary gas chromatography. Using FID detector and the column temperature between 70 and 80℃, the chir...A β-cyclodextrin derivative, perbenzyl-β-cyclodextrin, was prepared and used as a chiral stationary phase for capillary gas chromatography. Using FID detector and the column temperature between 70 and 80℃, the chiral separations of racemic 3-phenyl-1, 2-epoxyethane and 1-phenyl-1-propanol on a 14m×0.23mm I. D. fused silica column with the β-cyclodextrin derivative were carried out and the optical purities of optically active 1-phenyl-1-propanol samples prepared by asymmetric synthesis were determined.展开更多
建立了一种μ-QuEChERS结合气相色谱-三重四极杆串联质谱仪(gas chromatography-triple quadrupole tandem mass spectrometry,GC-MS/MS)在10 min内测定桃胶中106种农药残留的方法。样品经μ-QuEChERS方法提取、净化,经超高惰性气相色谱...建立了一种μ-QuEChERS结合气相色谱-三重四极杆串联质谱仪(gas chromatography-triple quadrupole tandem mass spectrometry,GC-MS/MS)在10 min内测定桃胶中106种农药残留的方法。样品经μ-QuEChERS方法提取、净化,经超高惰性气相色谱柱(highly inert gas chromatographic column,HIGC)分离,以三重四极杆-串联质谱仪检测分析,基质标准曲线外标法定量。106种农药在0.00200~0.400 mg/kg范围,其线性相关系数R均大于0.995,对于0.500 g样品的106种农药的检出限为(5.84×10^(-6))~(2.81×10^(-3))mg/kg,定量限为(1.95×10^(-5))~(9.36×10^(-3))mg/kg,且低、中、高3个浓度添加水平的回收率为72%~109%,相对标准偏差(relative standard deviations,RSDs)为0.73%~10%。该方法具有快捷、污染小、可靠性强的特点,适用于桃胶中多种农药残留的快速定性和定量检测。展开更多
文摘A β-cyclodextrin derivative, perbenzyl-β-cyclodextrin, was prepared and used as a chiral stationary phase for capillary gas chromatography. Using FID detector and the column temperature between 70 and 80℃, the chiral separations of racemic 3-phenyl-1, 2-epoxyethane and 1-phenyl-1-propanol on a 14m×0.23mm I. D. fused silica column with the β-cyclodextrin derivative were carried out and the optical purities of optically active 1-phenyl-1-propanol samples prepared by asymmetric synthesis were determined.
文摘建立了一种μ-QuEChERS结合气相色谱-三重四极杆串联质谱仪(gas chromatography-triple quadrupole tandem mass spectrometry,GC-MS/MS)在10 min内测定桃胶中106种农药残留的方法。样品经μ-QuEChERS方法提取、净化,经超高惰性气相色谱柱(highly inert gas chromatographic column,HIGC)分离,以三重四极杆-串联质谱仪检测分析,基质标准曲线外标法定量。106种农药在0.00200~0.400 mg/kg范围,其线性相关系数R均大于0.995,对于0.500 g样品的106种农药的检出限为(5.84×10^(-6))~(2.81×10^(-3))mg/kg,定量限为(1.95×10^(-5))~(9.36×10^(-3))mg/kg,且低、中、高3个浓度添加水平的回收率为72%~109%,相对标准偏差(relative standard deviations,RSDs)为0.73%~10%。该方法具有快捷、污染小、可靠性强的特点,适用于桃胶中多种农药残留的快速定性和定量检测。