Rapid, accurate and precise quantitative drug analysis: comparing liquid chromatography tandem mass spectrometry and chip-based nanoelectrospray ionisation mass spectrometry
Alfazema, Louisa N., Richards, Don S., Gélébart, Sylvie, Mitchell, John C. and Snowden, Martin J. (2005) Rapid, accurate and precise quantitative drug analysis: comparing liquid chromatography tandem mass spectrometry and chip-based nanoelectrospray ionisation mass spectrometry. European Journal of Mass Spectrometry , 11 (4). pp. 393-402. ISSN 1469-0667 (print), 1356-1049 (electronic) (doi:10.1255/ejms.772)Full text not available from this repository.
We have developed a liquid chromatography tandem mass spectrometry (LC-MS/MS) system capable of achieving better than 2% accuracy, routinely over a wide concentration range of 1–800 ng mL–1. We demonstrate that the necessary high precision, high accuracy and rapid analysis can be achieved using LC-MS/MS technology. Automated nanoelectrospray ionisation tandem mass spectrometry (nanoESI-MS/MS) technology can be employed to eliminate the chromatographic step completely. In this paper, nanoESI-MS/MS is evaluated and compared directly with LC-MS/MS for the quantitative analysis of two-test analytes, amitriptyline (ATT) and 5-methoxytryptamine (5-MTT), in aqueous/organic mixture. Calibration curves were found to be linear over a wide concentration range of 1–800 ng mL–1 for both analytes using LC-MS/MS. Using nanoESI-MS/MS ATT gave a linear response while 5-MTT gave a non-linear response using nanoESI-MS/MS over the same concentration range as in LC-MS/MS. Accuracy and precision values of quality control samples (QCs) at four concentration levels were analysed in replicates of six at each level using 5-MTT and ATT as test analytes for both techniques. The LC-MS/MS system was capable of achieving accuracy levels of 99.50–101.96% for ATT and 100.17–100.40% for 5-MTT. Accuracy levels using nanoESI-MS/MS were not comparable to LC-MS/MS, they ranged from 90.09–100.18% for ATT and 95.95–113.55% for 5-MTT. The precision values obtained for nanoESI-MS/MS were in good agreement with those obtained by LC-MS/MS.
|Uncontrolled Keywords:||accuracy. precision, 5-methoxytryptamine, amitriptyline, quantitative MS/MS, chip-based nanoelectrospray|
|Subjects:||Q Science > QD Chemistry|
|School / Department / Research Groups:||School of Science|
School of Science > Medway Sciences Research Group
|Last Modified:||07 Jun 2012 16:23|
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