The laboratory established an efficient reversed-phase ultra-high-performance liquid chromatographyquadrupole time-of-flight mass spectrometry(UPLC-Q-TOF-MS)qualitative method for screening more than 2000 kinds of ris...The laboratory established an efficient reversed-phase ultra-high-performance liquid chromatographyquadrupole time-of-flight mass spectrometry(UPLC-Q-TOF-MS)qualitative method for screening more than 2000 kinds of risk substances(including local anesthetics,LAs)in cosmetics,which has been successfully applied in the analysis of actual samples.This work aims to develop a more convenient high performance liquid chromatography triple quadrupole mass spectrometry(HPLC-QQQ-MS/MS)method for the quantitative determination of LAs.Samples were ultrasonically extracted with methanol,separated on an Agilent Poroshell 120 EC-C18 column(2.1 mm×100 mm,2.7μm),and eluted with a gradient mobile phase consisting of 0.1%formic acid aqueous solution and methanol.Quantification was performed using the external standard method.The results show that all 23 LAs are effectively separated within 12 minutes,with good linearity in the corresponding concentration ranges and the correlation coefficients all greater than 0.99.The limits of detection(LOD)range from 0.0025 to 0.05μg/g,and the limits of quantification(LOQ)range from 0.01 to 0.1μg/g.The average recoveries of the 23 LAs in 5 blank cosmetic matrices are 80.68%-117.57%,with the relative standard deviations(RSDs)less than 5.98%.This method has good precision and high accuracy,and is suitable for the determination of LAs in 5 cosmetic matrices.展开更多
文摘The laboratory established an efficient reversed-phase ultra-high-performance liquid chromatographyquadrupole time-of-flight mass spectrometry(UPLC-Q-TOF-MS)qualitative method for screening more than 2000 kinds of risk substances(including local anesthetics,LAs)in cosmetics,which has been successfully applied in the analysis of actual samples.This work aims to develop a more convenient high performance liquid chromatography triple quadrupole mass spectrometry(HPLC-QQQ-MS/MS)method for the quantitative determination of LAs.Samples were ultrasonically extracted with methanol,separated on an Agilent Poroshell 120 EC-C18 column(2.1 mm×100 mm,2.7μm),and eluted with a gradient mobile phase consisting of 0.1%formic acid aqueous solution and methanol.Quantification was performed using the external standard method.The results show that all 23 LAs are effectively separated within 12 minutes,with good linearity in the corresponding concentration ranges and the correlation coefficients all greater than 0.99.The limits of detection(LOD)range from 0.0025 to 0.05μg/g,and the limits of quantification(LOQ)range from 0.01 to 0.1μg/g.The average recoveries of the 23 LAs in 5 blank cosmetic matrices are 80.68%-117.57%,with the relative standard deviations(RSDs)less than 5.98%.This method has good precision and high accuracy,and is suitable for the determination of LAs in 5 cosmetic matrices.
文摘采用高效液相色谱-串联四极杆飞行时间质谱(HPLC-Q-TOF-MS)结合超高效液相色谱-三重四极杆串联质谱(UPLC-QQQ-MS/MS)对东革阿里提取物中的总生物碱进行定性和定量分析。HPLC-Q-TOF-MS采用Welch Ultimate XB-C_(18)色谱柱(4.6 mm×250 mm, 5μm),以乙腈(内含0.1%甲酸)-0.1%甲酸水为流动相进行梯度洗脱。UPLC-QQQ-MS/MS采用Agilent Eclipse Plus C_(18)色谱柱(2.1 mm×50 mm, 1.8μm),以乙腈(内含0.1%甲酸)-0.1%甲酸水为流动相进行梯度洗脱。质谱分析均采用电喷雾正离子模式采集。HPLC-Q-TOF-MS通过对照品比对及高分辨质谱数据解析,鉴定了东革阿里中17种生物碱成分并解析了其裂解规律。UPLC-QQQ-MS/MS定量分析东革阿里中3种生物碱成分,在考察的浓度范围内线性关系良好(r≥0.999 7),回收率为108.8%~110.2%,RSD为2.9%~5.3%。该方法快速、可靠、高效,能较全面地反映东革阿里中的生物碱成分及其含量,可为深入阐明东革阿里的药效物质基础及其质量标准研究提供参考。
