Utility of the hybrid LTQ-FTMS for drug metabolism applications.
Utility of the hybrid LTQ-FTMS for drug metabolism applications.
复制标题
混合 LTQ-FTMS 在药物代谢应用中的实用性。
DOI：
10.2174/138920006777697972
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发表时间：
2006
影响因子：
2.3
通讯作者：
B. Warrack
中科院分区：
文献类型：
--
作者：
M. Sanders;P. Shipkova;Haiying Zhang;B. Warrack
傅里叶变换离子回旋质谱（FTMS）提供了目前可用的质谱仪中最高的质量精度和质量分辨率。其用于吸收、分布、代谢和排泄（ADME）应用的主要缺点之一是与标准HPLC柱和流速不兼容。混合仪器，如LTQ-FT，在FT质谱仪的卓越性能和功能与四极杆和离子阱的完善，测试和验证的特性之间提供了急需的桥梁。混合仪器兼容标准HPLC流速，具有高通量和自动化兼容性，并提供数据依赖的MSn。能够在分析物浓度快速变化的HPLC峰上保持外部校准的精确质量测量的保真度，是该技术的重大进步，也是在色谱时间尺度上执行数据依赖的MS/MS实验的能力。MSn和精确的质量能力通常用于快速确认预期代谢物的鉴定或阐明不寻常或意外代谢物的结构。LTQ-FTMS结合了传统的高流量色谱法和强大的、外部校准的对母体和产物离子的精确质量测定，使LTQ-FTMS成为代谢物表征、代谢软点鉴定和代谢组学研究的强大分析工具。
Fourier Transform Ion Cyclotron Mass Spectrometry (FTMS) provides the highest mass accuracy and mass resolving power of the currently available mass spectrometers. One of the main drawbacks in its use for absorption, distribution, metabolism and excretion (ADME) applications has been its incompatibility with standard HPLC columns and flow rates. Hybrid instruments, such as the LTQ-FT, provide the much needed bridge between the excellent performance and capabilities of the FT mass spectrometers and the well-established, tested and validated features of quadrupoles and ion traps. The hybrid instruments are compatible with standard HPLC flow rates, have high-throughput and automation compatibility, and also provide data dependant MSn. The ability to maintain the fidelity of an externally calibrated accurate mass measurement across an HPLC peak, where the analyte concentrations are rapidly changing, is a significant advance for this technology, as is the ability to perform data dependent MS/MS experiments on the chromatographic time scale. The MSn and accurate mass capabilities are routinely utilized to rapidly confirm the identification of expected metabolites or to elucidate the structures of unusual or unexpected metabolites. The combination of traditional high-flow chromatography and robust, externally calibrated accurate mass determination for both parent and product ions makes the LTQ-FTMS a very powerful analytical tool for the characterization of metabolites, identification of metabolic soft-spots and for metabonomics studies.