Chinese herbal compound is playing an important role on curing human diseases.And it has been a trend that Chinese herbal compound is being used all over the world in 21 century.However,our Chinese herbal compound is ...Chinese herbal compound is playing an important role on curing human diseases.And it has been a trend that Chinese herbal compound is being used all over the world in 21 century.However,our Chinese herbal compound is facing serious challenge for the lack of canonical system of quality criterion for Chinese herbal compound so it has been a urgent problem to set up the quality control standards and reveal therapeutic basis of Chinese herbal compound.In order to give full play to the advantages of Chinese herbal compound,modern scientific and technological is used to research of Chinese herbal compound,especially the high performance liquid chromatography tandem mass spectrometry(HPLC-MS),because it is high sensitive,rapid,and obtain more information.It is very necessary that HPLC-MS is uesed to elucidate the effective components of basic substances of Chinese Herbal Compound,and endow traditional Chinese medicine with modern scientific connotation.展开更多
Five thyreostats(TSs),namely tapazole,thiouracil,methylthiouracil,propylthiouracil,and phenylthiouracil,were determined in bovine urine using ultra-high performance liquid chromatography-tandem mass spectrometry(UHPLC...Five thyreostats(TSs),namely tapazole,thiouracil,methylthiouracil,propylthiouracil,and phenylthiouracil,were determined in bovine urine using ultra-high performance liquid chromatography-tandem mass spectrometry(UHPLC-MS/MS)in positive electrospray ionization mode.Extraction and clean-up were achieved using a ChemElut cartridge with tert-butyl methyl ether,without a derivatization step.Separation was achieved on an Acquity UPLC SS T3 column.The mobile phase was acetonitrile and water containing 0.2%(v/v)formic acid.The mass spectrometer was operated in multiple reaction monitoring mode.Urine samples were spiked with TS solution at levels corresponding to 5,10,15,and 20μg/L.The accuracy(internal standard corrected)ranged from 92%to 107%,with a repeatability precision(relative standard deviation,RSD)less than 15%for all five analytes.The RSDs within-laboratory reproducibility was less than 26%.The decision limits(CCα)and detection capabilities(CCβ)were obtained from a calibration curve and were in the ranges of 3.1-6.1μg/L and 4.0-7.4μg/L,respectively.The CCαand CCβvalues were below the recommended concentration,which was set at 10μg/L.The results show that the described method is suitable for the direct detection of TSs in bovine urine.This method can also be used to determine TSs in porcine urine.展开更多
目的建立高效液相色谱-串联质谱法(high performance liquid chromatography-tandem mass spectrometer,HPLC-MS/MS)检测果膏中晚期糖基化终末产物(advanced glycation end products,AGEs)和5-羟甲基糠醛(5-hydroxymethylfurfural,5-HMF...目的建立高效液相色谱-串联质谱法(high performance liquid chromatography-tandem mass spectrometer,HPLC-MS/MS)检测果膏中晚期糖基化终末产物(advanced glycation end products,AGEs)和5-羟甲基糠醛(5-hydroxymethylfurfural,5-HMF)的方法。方法枇杷果膏以纯水浸提、超声处理后,再经离心、固相萃取、氨水-甲醇溶液洗脱得到AGEs提取液,以0.1%甲酸水和甲醇为流动相,梯度洗脱,采用多反应监测正离子源模式检测;果膏经纯水浸提、乙酸乙酯提取、固相萃取、10%甲醇洗脱得到5-HMF提取液,以体积比10%甲醇水为流动相,在柱温30℃下检测。结果3种目标物在浓度范围内均线性关系良好;检出限和定量限均小于1[AGEs/(ng/mL);5-HMF/(μg/mL)],可满足痕量物质的检测要求;相对标准偏差(relative standard deviations,RSDs)均小于10%,且在16 h样品待测时间范围内低于0.6%;加标回收率均大于85%。结论本研究优化的方法可满足定量分析的基本要求,具有良好的准确性和稳定性,为热加工果蔬产品质量与安全研究提供了检测手段。展开更多
文摘Chinese herbal compound is playing an important role on curing human diseases.And it has been a trend that Chinese herbal compound is being used all over the world in 21 century.However,our Chinese herbal compound is facing serious challenge for the lack of canonical system of quality criterion for Chinese herbal compound so it has been a urgent problem to set up the quality control standards and reveal therapeutic basis of Chinese herbal compound.In order to give full play to the advantages of Chinese herbal compound,modern scientific and technological is used to research of Chinese herbal compound,especially the high performance liquid chromatography tandem mass spectrometry(HPLC-MS),because it is high sensitive,rapid,and obtain more information.It is very necessary that HPLC-MS is uesed to elucidate the effective components of basic substances of Chinese Herbal Compound,and endow traditional Chinese medicine with modern scientific connotation.
文摘Five thyreostats(TSs),namely tapazole,thiouracil,methylthiouracil,propylthiouracil,and phenylthiouracil,were determined in bovine urine using ultra-high performance liquid chromatography-tandem mass spectrometry(UHPLC-MS/MS)in positive electrospray ionization mode.Extraction and clean-up were achieved using a ChemElut cartridge with tert-butyl methyl ether,without a derivatization step.Separation was achieved on an Acquity UPLC SS T3 column.The mobile phase was acetonitrile and water containing 0.2%(v/v)formic acid.The mass spectrometer was operated in multiple reaction monitoring mode.Urine samples were spiked with TS solution at levels corresponding to 5,10,15,and 20μg/L.The accuracy(internal standard corrected)ranged from 92%to 107%,with a repeatability precision(relative standard deviation,RSD)less than 15%for all five analytes.The RSDs within-laboratory reproducibility was less than 26%.The decision limits(CCα)and detection capabilities(CCβ)were obtained from a calibration curve and were in the ranges of 3.1-6.1μg/L and 4.0-7.4μg/L,respectively.The CCαand CCβvalues were below the recommended concentration,which was set at 10μg/L.The results show that the described method is suitable for the direct detection of TSs in bovine urine.This method can also be used to determine TSs in porcine urine.
文摘目的建立高效液相色谱-串联质谱法(high performance liquid chromatography-tandem mass spectrometer,HPLC-MS/MS)检测果膏中晚期糖基化终末产物(advanced glycation end products,AGEs)和5-羟甲基糠醛(5-hydroxymethylfurfural,5-HMF)的方法。方法枇杷果膏以纯水浸提、超声处理后,再经离心、固相萃取、氨水-甲醇溶液洗脱得到AGEs提取液,以0.1%甲酸水和甲醇为流动相,梯度洗脱,采用多反应监测正离子源模式检测;果膏经纯水浸提、乙酸乙酯提取、固相萃取、10%甲醇洗脱得到5-HMF提取液,以体积比10%甲醇水为流动相,在柱温30℃下检测。结果3种目标物在浓度范围内均线性关系良好;检出限和定量限均小于1[AGEs/(ng/mL);5-HMF/(μg/mL)],可满足痕量物质的检测要求;相对标准偏差(relative standard deviations,RSDs)均小于10%,且在16 h样品待测时间范围内低于0.6%;加标回收率均大于85%。结论本研究优化的方法可满足定量分析的基本要求,具有良好的准确性和稳定性,为热加工果蔬产品质量与安全研究提供了检测手段。
