Isotopic enrichment of branched-chain L-amino acids ( BCAA) and branched-chain 2-oxo acids ( BCOA) in standard preparations and in human plasma samples withdrawn after oral loads with 1-C-13 labelled BCAA were measured on a conventional GC-MS system and an on-line GC-C-IRMS employing O...
酿酒科技013年第9期总第31期·LIQUOR-MAKINGSCIENCE&TECHNOLOGY013No.9To1.31一气相色谱一燃烧一同位素质谱仪GC—C—IRMS测定游离氨基酸的j6iBC值钟其顶13,李国辉,一,王道兵,一,熊正河一,王1.天津科技大学,工业发酵微生物教育部重点实验室,生物工程学院,天津300
EA-IRMS-iRIS 13C 14C同位素测量系统是耦合中红外分布反馈量子级联和低温腔衰荡光谱(CRDS)技术的新一代光谱同位素分析系统,同时整合了传统的同位素质谱分析技术,一套系统兼具两种不同同位素测量技术的优势。精密的工业设计使得该系统可以在60分钟内一次性获得有机物和/或无机物的稳定性13C和15N同位素及放射性14C同位素...
Metabolic Flux Analysis for Larger Scale Using13C-Labeled Substrates and GC-C-IRMSMetabolic fluxIsotopomersNo abstract is available for this article.doi:10.1002/cite.201050726Y. YuanUniversitt des SaarlandesT. H. Yang DrGenomaticaE. Heinzle Prof...
摘要:食醋中乙酸的碳一13比值( C)与食醋原料有密切关联,通过测定乙酸中”C可对食醋原料进行溯 源。本工作建立了有机溶剂稀释法与气相色谱一燃烧一稳定同位素比值质谱(GC-C—IRMS)联用法测定食醋中 乙酸的6“C。在乙酸浓度为2 ～99.9 的模拟样品测试中获得了稳定的检测结果;同一样品中乙酸的”C ...
Determination of 13C isotopic enrichment of valine and threonine by GC-C-IRMS after formation of the N(O,S)-ethoxycarbonyl ethyl ester derivatives of the amino acids. Analytical and Bioanalytical Chemistry 2007; 388: 909.Jean-Philippe Godin,Magali Faure,Denis Breuille,Gérard Hopfgartner,Laurent-...
【目的】利用气相色谱-燃烧-同位素比值质谱仪(gas chromatography-combustion-isotope ratio masss pectrometry,GC-C-IRMS)测定小麦籽粒氨基酸碳氮稳定同位素组成。【... 徐春英,李玉中,梅旭荣,... - 《中国农业科学》 被引量: 12发表: 2009年 GC-C-IRMS分析氨基酸碳氮同位素的衍生化方法及其展望 同位素示踪研究中...
GC-IRMS: δ13C in Fatty Acid Methyl Esters (FAME) Andreas W. Hilkert, Dieter Juchelka, Thermo Fisher Scientific, Bremen, Germany; Charles B. Douthitt, Thermo Fisher Scientific, Arizona, USA Key Words Compound Specific Isotope Ratio, Fatty Acid Methyl Esters, Isotope Ratio MS Introduction Gas...
Thermal degradation experiments carried out on gas / oil mixtures doped with 13C labelled precursors (13CH4 and &-13C-nC12) and the GC-C-IRMS measurement of individual compounds has shown the complexity of interactions occurring in heated hydrocarbon mixtures. In particular: 1- the chemical inc...
我最近在测C-O同位素，用的是 Thermo Scientific Gas Bench II