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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Flender, Cornelia Wolf, Christian Leonhard, Peter Karas, Michael |
| Description | Country affiliation: Germany Author Affiliation: Flender C ( Merck KGaA, Darmstadt, Germany. cflender@gmail.com) |
| Abstract | A novel interface adapter has been designed to provide a new way of directly coupling a nano-liquid chromatograph to an electron ionization mass spectrometer. It connects the transfer capillary coming from the liquid chromatograph to the ionization chamber and can be easily screwed into the ion source. Liquid coming from the column passes through the heated adapter flow path and is vaporized. A continuous flow of new liquid pushes the vapor into the ionization chamber where it is ionized and continues on to the mass analyzer. The advantages of the new adapter are reduced ice formation inside the ion source and less clogging of the transfer capillary. Improvements achieved are demonstrated on the basis of caffeine and steroid analysis. The limits of detection of selected steroids are compared with and without the adapter. The adapter improves the detection limit of the system by a factor of 2 and precision from ≤15% to ≤9% relative standard deviation. No derivatization procedure is necessary before the analysis of small polar compounds. The resulting spectra are reproducible, easily interpretable, and database searchable. The new method is robust, delivers reproducible results, and provides a highly efficient alternative to existing methods in the field of pharmaceutical analysis. |
| File Format | HTM / HTML |
| ISSN | 10765174 |
| Issue Number | 10 |
| Volume Number | 46 |
| e-ISSN | 10969888 |
| Journal | Journal of Mass Spectrometry |
| Language | English |
| Publisher | Wiley |
| Publisher Date | 2011-10-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Spectroscopy Discipline Chemistry Techniques Chromatography, High Pressure Liquid Instrumentation Spectrometry, Mass, Electrospray Ionization Steroids Analysis Electrons Equipment Design Limit Of Detection Evaluation Studies Journal Article |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Medicine |
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