As these structures do not contain chromophores and possess weak UV absorption characteristics, HPLC-CAD and UPLC-LTQ-Orbitrap-MS were employed to carry out the quality control of the impurities. Then, column chromatography (CC), preparative thin-layer chromatography (PTLC), and crystallization led ...
利用HPLC-MS研究高锰酸钾对水中MC-IR的降解作用
(3)采用HPLCCAD法,检测对照品和供试品中积雪草苷B和/或羟基积雪草苷的含量,其中,采用的色谱柱以三十烷基硅烷键合硅胶作为填充剂.本发明采用HPLCCAD法,色谱柱以三十烷基硅烷键合硅胶为填料,使用成分简单的流动相即可实现互为同分异构体的两成分有效分离并准确评价样品中积雪草苷B和羟基积雪草苷含量,简便,灵敏,准确...
生化试剂盒 Biochemical kit 检测服务 Testing service 货号 UPLC-MS-4245 价格910 指标名称 Cinnamon Alcohol Dehydrogenase (CAD) Activity 检测仪器 紫外分光光度计 可检测样本数 48 Sample 规格 50管/48样 说明书 点击下载 提示:官网说明书如与试剂盒内纸质版有出入,请以纸质版为准!
本发明公开了一种基于化学衍生化与HPLC‑MS的不饱和脂肪酸定量方法1)以直接质谱分析确定脂肪酸的标准优化锥电压和碰撞能量电压;2)以不饱和脂肪酸A作为内标,将内标和标准品脂肪酸进行碳碳双键环氧化,并通过HPLC‑ESI‑MS方法进行检测,建立标准品脂肪酸与内标的标准曲线;3)将待测脂肪酸进行碳碳双键环氧化;4)将...
Introduction High-performance liquid chromatography with tandem mass spectrometric detection ( HPLC – MS/MS ) has become a popular tool in environmental chemistry as well as in pharmaceutical, pesticide and forensic chemistry. Currently electrospray ionisation (ESI) and atmospheric pressure chemical ionisat...
HPLC-Methods using Charged Aerosol Detector (CAD), UV-Detector and Mass Spectrometer (MS) were developed to investigate the degradation of excipients Polysorbate 80, sucrose laurate and Vitamin E Polyethylene Glycol Succinate (TPGS) in physiological relevant pH values. Moreover the susceptibility to ...
OBJECTIVE To establish an HPLC-MS / MS method for simultaneous determination of repaglinide and metformin in human plasma and to investigate its pharmacokinetics in human. METHODS After protein precipitation by acetonitrile,concentrations of repaglinide and metformin were analyzed on Kromasil 60-5CN column...
UHPLC/UV/CAD/Q-ToF MS is an ideal approach for obtaining identification and semi-quantitation of botanical constituents. Identifications were greatly facilitated by the use of UHPLC separations and high resolution mass analysis. Typically experiments using ESI and APCI (positive and negative ion mode...
Identification and direct determination of fatty acids profile in oleic acid by HPLC-CAD and MS-IT-TOFXun Zhao a bYuanzi He cJungen Chen cJunying Zhang cLei Chen dBaocheng Wang eChunyong Wu cYaozuo Yuan a bJournal of Pharmaceutical and Biomedical Analysis...