CRO (Contract Research Organization)

In a world where productivity means higher throughput, all laboratories would like to work with a technology that provides an analysis 10 to 100 times faster than their current LC-MS/MS system. Drug quantification in plasma samples can be as fast as 4 seconds per sample without compromising accuracy.

If you want to discover how... view how the LDTD performed for drug quantification

Scientific Publication

• Journal of Pharmaceutical and Biomedical Analysis 2010, 53, pp 740-744 Determination of metformin in mouse, rat, dog and human plasma samples by llaser diode thermal desorption/atmospheric pressure chemical ionization tandem mass spectrometry, John G. Swales, Richard Gallagher and Raimund M. Peter. DOI:10.1016/j.jpba.2010.04.033
• Analytical Chemistry 2007, 79(12), pp 4657-4665 High-throughput Cytochrome P450 Inhibition Assays Using Laser Diode Thermal Desorption-Atmospheric Pressure Chemical Ionization-Tandem Mass Spectrometry, Jin Wu, Christopher S. Hughes, Pierre Picard, Sylvain Letarte, Mireille Gaudreault, Jean-François Lévesque, Deborah A. Nicoll-Griffith, and Kevin P. Bateman DOI: 10.1021/ac070221o
• Note : The results published into the Analytical Chemistry (2007) paper were obtained with a beta-LDTD ion source. Therefore, the laser power reported should not be used with the current LDTD ion source models. Moreover, Phytronix has observed that for more accurate CYP 1A2 results, the probe whould be monitor in negative mode. Please refer to the application note 0714 (below) for updated operation conditions.

Application notes

• AN-1003 : CACO-2 Permeability Coefficient Determination in LDTD-MS/MS.
• AN-1002 : High Throughput Workflow Analysis : Dextrorphan in Human Plasma.
• AN-0706 : High Throughput Analysis of 960 Reserpine Samples in 1.9 hours.
• AN-0708 : LDTD-MS/MS in 1.8 seconds with RSD of 2.4 % : Paracetamol in Human Plasma Crash.
• AN-0709 : Midazolam and 1-Hydroxymidazolam in Human Plasma : LDTD-MS/MS Analysis in 8 Seconds.
• AN-0710 : LDTD-MS/MS Analysis in 9 Seconds : Quantification of Mifepristone in Mouse Plasma.
• AN-0714 : High Throughput LDTD-MS/MS IC50 Determination of CYP Inhibition in HLM.

Oral Presentations

• ASMS 2011 Validation of an Analytical Method to Quantify a Xenobiotic in Rat Plasma...
• Pittcon 2011 Effect of Phospholipids and Formulation Agents in LDTD-MS/MS Analysis of Dextrorphan in Human and Rat Plasma
• ASMS 2010 Evaluation of Phospholipids Effect on Ionization in LDTD-MS/MS Analysis of Human Plasma Extracts from Protein Precipitation, SPE and Liquid-Liquid Extraction

Oral presentation produced by LDTD users

• ASMS 2011 Validation of an Analytical Method to Quantify a Xenobiotic in Rat Plasma Using LDTD-APCI Coupled to Tandem Mass Spectrometry (Sanofi-Aventis, France)
• ASMS 2010 High-Throughput LDTD384-MS/MS for Drug Metabolism and Pharmacokinetic Studies (Merck Canada)

Oral presentation produced in collaboration with LDTD users

• ASMS 2010 LDTD384-MS/MS for In Vitro Assays : Different Buffer Environments (in Collaboration with Sanofi-Aventis, France)

Posters

• ASMS 2011 Dry Blood Spot Sampling Technology Evaluated for LDTD-MS/MS Analysis
• ASMS 2011 LDTD-MS/MS in GLP Environment : What Sould be Done?
• ASMS 2011 Speeding up the Dry Blood Spot Sampling With On Step Automated Multiple Extractions Combined with LDTD-MS/MS Anslysis
• ASMS 2009 24 High Throughput LDTD-MS/MS IC50 Determination of CYP Inhibition in Human Liver Microsome (HLM).
• ASMS 2009 High Throughput Workflow for Midazolam and 1-Hydroxymidazolam Analysis in Human Plasma.
• ASMS 2008 Midazolam and 1-Hydroxymidazolam Determination in Human EDTA Plasma by LDTD/MS/MS in 8 seconds.
• ASMS 2008 High-Throughput Analysis of Mifepristone and Two Mifepristone Analogues in Mouse Heparin Plasma by LDTD-MS/MS in 9 seconds.
• ASMS 2007 High-Throughput LDTD-MS/MS Determination of Reserpine : 1000 Samples in less than 2 hours.

Posters produced by LDTD users

• ASMS 2011 Quantitation of Small Pharmaceutical Compound by LDTD/MS/MS, Atmospheric Pressure Chemical Ionization, As Compared to LC/MS/MS for Clinical Study Sample
• ASMS 2011 High Throughput Caco-2/TC7 Human Intestinal Absorprtion Screening Using Laser Diode Thermal Desorption – Atmospheric...
• ASMS 2010 Determination of Metformin in Mouse, rat, Dog and Human Plasma Samples by LDTD-APCI-MS/MS
• ASMS 2010 Evaluation of Drug Plasma Stability Using an Ultra-High Throughput Laser Diode Thermal Desorption (LDTD) Methodology.
• IMSC 2009 Laser Diode Thermal Desorption (LDTD) Mass Spectrometry for High Throughput Analyses of Discovery DMPK In Vitro and In Vivo samples.
• ASMS 2009 Validation of Pioglitazone in Human Serum by Two Sample Introduction Methods : LDTD-APCI/MS/MS and LC-ESI/MS/MS.
• ASMS 2009 Application of LDTD-APCI-MS to Support Plasma Protein Bonding Study in Drug Discovery.

Posters produced in collaboration with LDTD users

• ASMS 2009 Analysis of Fatty Acid Methyl Esters Using the High Throughput LDTD Source Coupled to the LTQ Orbitrap Mass Spectrometer.
• ASMS 2008 Selected Ion Monitoring (SIM) Mode Data Collection Using the Laser Diode Thermal Desorption (LDTD) Source to Increase Sensitivity.
• ASMS 2008 Comparison of Laser Diode Thermal Desorption (LDTD) source vs LC-MS for the analysis of a therapeutic drug in biological extracts (In collaboration with Astra Zeneca, UK)
• ISSX 2008 Comparison of Various High Throughput Mass Spectrometry-based Technologies to Assess CYP Inhibitions.
• ASMS 2007 Application of a Laser Diode Thermal Desorption (LDTD) Ion Source for Mass Spectrometry in a Drug Discovery Environment.