Time-of-flight mass spectrometry (TOF-MS) is widely used in protein chemistry and proteomics research due to its high sensitivity , resolution and accuracy. Recently we have developed two Q-TOF-MS analytical systems t...Time-of-flight mass spectrometry (TOF-MS) is widely used in protein chemistry and proteomics research due to its high sensitivity , resolution and accuracy. Recently we have developed two Q-TOF-MS analytical systems titled as “ESI-TOF-MS detector of HPLC”, which have promising features and arrive at the coordinative level compared with the congener overseas production. The ESI-Orthogonal Acceleration-Reflecting-TOF mass spectrometry can detect the lysozyme sample concentration below 1 pmol/μL under the optimized conditions. The mass range of these instruments is from 50 to 6000dahon with a general ESI interface to the HPLC. The optimal mass resolution exceeds 6000(FWHM)and the signal/noise ratio of Reserpine (10 ng/L) is greater than 100.展开更多
目的建立测定托吡酯片中主要成分及杂质含量的高效液相色谱-电雾式检测器(HPLC-CAD)法。方法色谱柱为Waters Sun Fire C_(18)柱(150 mm×4.6 mm,5μm),流动相为乙腈-0.2%甲酸水溶液(35∶65,V/V),流速为1.0 m L/min,柱温为35℃,雾化...目的建立测定托吡酯片中主要成分及杂质含量的高效液相色谱-电雾式检测器(HPLC-CAD)法。方法色谱柱为Waters Sun Fire C_(18)柱(150 mm×4.6 mm,5μm),流动相为乙腈-0.2%甲酸水溶液(35∶65,V/V),流速为1.0 m L/min,柱温为35℃,雾化温度为35℃,过滤常数为3.6 s,幂率为1.0,采样频率为10 Hz,进样量为10μL。结果托吡酯质量浓度在0.05~1.0 mg/m L范围内与峰面积线性关系良好(r=0.9956),检测限和定量限分别为1μg/m L和3μg/m L;精密度、稳定性、重复性试验结果的RSD均小于2.0%;平均加样回收率为100.19%,RSD为1.19%(n=9)。3批样品中托吡酯含量为97.98%~98.96%,杂质总量为0.25%~0.31%。结论所建立的方法操作简便,结果准确可靠,可用于托吡酯片中主要成分及杂质的含量测定。展开更多
文摘Time-of-flight mass spectrometry (TOF-MS) is widely used in protein chemistry and proteomics research due to its high sensitivity , resolution and accuracy. Recently we have developed two Q-TOF-MS analytical systems titled as “ESI-TOF-MS detector of HPLC”, which have promising features and arrive at the coordinative level compared with the congener overseas production. The ESI-Orthogonal Acceleration-Reflecting-TOF mass spectrometry can detect the lysozyme sample concentration below 1 pmol/μL under the optimized conditions. The mass range of these instruments is from 50 to 6000dahon with a general ESI interface to the HPLC. The optimal mass resolution exceeds 6000(FWHM)and the signal/noise ratio of Reserpine (10 ng/L) is greater than 100.
文摘目的建立测定托吡酯片中主要成分及杂质含量的高效液相色谱-电雾式检测器(HPLC-CAD)法。方法色谱柱为Waters Sun Fire C_(18)柱(150 mm×4.6 mm,5μm),流动相为乙腈-0.2%甲酸水溶液(35∶65,V/V),流速为1.0 m L/min,柱温为35℃,雾化温度为35℃,过滤常数为3.6 s,幂率为1.0,采样频率为10 Hz,进样量为10μL。结果托吡酯质量浓度在0.05~1.0 mg/m L范围内与峰面积线性关系良好(r=0.9956),检测限和定量限分别为1μg/m L和3μg/m L;精密度、稳定性、重复性试验结果的RSD均小于2.0%;平均加样回收率为100.19%,RSD为1.19%(n=9)。3批样品中托吡酯含量为97.98%~98.96%,杂质总量为0.25%~0.31%。结论所建立的方法操作简便,结果准确可靠,可用于托吡酯片中主要成分及杂质的含量测定。