A hybrid liquid chromatography–mass spectrometry strategy in a forensic laboratory for opioid, cocaine and amphetamine classes in human urine using a hybrid linear ion trap-triple quadrupole mass spectrometer

2010 ◽  
Vol 1217 (44) ◽  
pp. 6857-6866 ◽  
Author(s):  
Geraldine Dowling ◽  
Liam Regan ◽  
Julie Tierney ◽  
Michael Nangle
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Mass Spectrometer ◽  
Human Urine ◽  
Ion Trap ◽  
Linear Ion Trap ◽  
Triple Quadrupole ◽  
Liquid Chromatography Mass Spectrometry ◽  
Quadrupole Mass ◽  
Triple Quadrupole Mass Spectrometer

scholarly journals Multistage Fragmentation of Ion Trap Mass Spectrometry System and Pseudo-MS3of Triple Quadrupole Mass Spectrometry Characterize Certain (E)-3-(Dimethylamino)-1-arylprop-2-en-1-ones: A Comparative Study

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Ali S. Abdelhameed ◽  
Adnan A. Kadi ◽  
Hatem A. Abdel-Aziz ◽  
Rihab F. Angawi ◽  
Mohamed W. Attwa ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Mass Spectrometer ◽  
Ion Trap ◽  
Quadrupole Mass Spectrometer ◽  
Ion Trap Mass Spectrometry ◽  
Triple Quadrupole ◽  
Quadrupole Mass ◽  
Triple Quadrupole Mass Spectrometer ◽  
Fragment Ions ◽  
Mass Spectrometry System

A new approach was recently introduced to improve the structure elucidation power of tandem mass spectrometry simulating the MS3of ion trap mass spectrometry system overcoming the different drawbacks of the latter. The fact that collision induced dissociation in the triple quadrupole mass spectrometer system provides richer fragment ions compared to those achieved in the ion trap mass spectrometer system utilizing resonance excitation. Moreover, extracting comprehensive spectra in the ion trap needs multistage fragmentation, whereas similar fragment ions may be acquired from one stage product ion scan using the triple quadrupole mass spectrometer. The new strategy was proven to enhance the qualitative performance of tandem mass spectrometry for structural elucidation of different chemical entities. In the current study we are endeavoring to prove our hypothesis of the efficiency of the new pseudo-MS3technique via its comparison with the MS3mode of ion trap mass spectrometry system. Ten pharmacologically and synthetically important (E)-3-(dimethylamino)-1-arylprop-2-en-1-ones (enaminones4a–j) were chosen as model compounds for this study. This strategy permitted rigorous identification of all fragment ions using triple quadrupole mass spectrometer with sufficient specificity. It can be used to elucidate structures of different unknown components. The data presented in this paper provide clear evidence that our new pseudo-MS3may simulate the MS3of ion trap spectrometry system.

scholarly journals Screening of Drugs and Toxic Compounds with Liquid Chromatography-Linear Ion Trap Tandem Mass Spectrometry

2006 ◽  
Vol 52 (9) ◽  
pp. 1735-1742 ◽  
Author(s):  
François-Ludovic Sauvage ◽  
Franck Saint-marcoux ◽  
Bénédicte Duretz ◽  
Didier Deporte ◽  
Gérard Lachatre ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Tandem Mass Spectrometry ◽  
Mass Spectrometer ◽  
Ion Trap ◽  
Linear Ion Trap ◽  
Tandem Mass ◽  
Triple Quadrupole ◽  
Toxic Compounds ◽  
Quadrupole Linear Ion Trap

Abstract Background: In clinical and forensic toxicology, general unknown screening is used to detect and identify exogenous compounds. In this study, we aimed to develop a comprehensive general unknown screening method based on liquid chromatography coupled with a hybrid triple-quadrupole linear ion trap mass spectrometer. Methods: After solid-phase extraction, separation was performed using gradient reversed-phase chromatography. The mass spectrometer was operated in the information-dependent acquisition mode, switching between a survey scan acquired in the Enhanced Mass Spectrometry mode with dynamic subtraction of background noise and a dependent scan obtained in the enhanced product ion scan mode. The complete cycle time was 1.36 s. A library of 1000 enhanced product ion–tandem mass spectrometry spectra in positive mode and 250 in negative mode, generated using 3 alternated collision tensions during each scan, was created by injecting pure solutions of drugs and toxic compounds. Results: Comparison with HPLC-diode array detection and gas chromatography-mass spectrometry for the analysis of 36 clinical samples showed that linear ion trap tandem mass spectrometry could identify most of the compounds (94% of the total). Some compounds were detected only by 1 of the other 2 techniques. Specific clinical cases highlighted the advantages and limitations of the method. Conclusion: A unique combination of new operating modes provided by hybrid triple-quadrupole linear ion trap mass spectrometers and new software features allowed development of a comprehensive and efficient method for the general unknown screening of drugs and toxic compounds in blood or urine.

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