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Quantification of Benzodiazepines in Human Plasma or Serum by Liquid Chromatography Tandem Mass Spectrometry for Clinical Research

15 Feb 2018

In this application note, a clinical research analytical method for the quantification of 35 benzodiazepines in human plasma or serum is reported. The panel includes :

3-hydroxybromazepam, 7-aminoclonazepam, 7-aminoflunitrazepam, 7-aminonitrazepam, α-OH-alprazolam, α-OH-midazolam, α-OH-triazolam, alprazolam, bromazepam, chlordiazepoxide, clobazam, clonazepam, demoxepam, desalkylflurazepam, desmethylflunitrazepam, diazepam, estazolam, flunitrazepam, flurazepam, lorazepam, lormetazepam, medazepam, midazolam, nitrazepam, norclobazam, nordiazepam, oxazepam, prazepam, temazepam, tetrazepam, trazodone, triazolam, zaleplon, zolpidem, and zopiclone.

Thermo Scientific™ Vanquish™ Flex Quaternary UHPLC System

Thermo Fisher Scientific

The Thermo Scientific™ Vanquish™ Flex Binary UHPLC system is biocompatible with a state-of-the-art binary high-pressure pump and state-of-the-art binary solvent blending. This ultra high performance liquid chromatography system shares all Vanquish values, such as a design focused on uptime, robustness and reliability. Multiple detection options as well as Thermo Scientific™ Viper™ fingertight connections throughout the system will give you the performance you need with the ease of use you want. Our SmartFlow™ pumping technology with automatic compensation for changing eluent compressibility ensures excellent flow and gradient precision, independent of eluent composition and backpressures. This gives you unrivaled retention time precision and highest data confidence, even for ternary and quaternary gradients, and for more freedom in method development and application switching. Detection capabilities include high sensitivity and linearity Diode Array Detection with LightPipe technology, selective and sensitive Fluorescence Detection and near-universal detection capabilities with the Vanquish Charged Aerosol Detector. Key Features: Integrated modularity design concept to offer uncompromising UHPLC State-of-the-art quaternary solvent blending 1000 bar of pump pressure and flow rates up to 8 mL/min Industry-leading flow and gradient precision Multiple detection options including DAD, FLD and CAD Relevant Applications: Separations of Intact mAbs Analysis of labeled glycans Ternary gradient impurity profiling Efficient, reliable peptide mapping

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UHPLC and HPLCHigh performance liquid chromatography (HPLC) and ultra high performance liquid chromatography (UHPLC), also known as UPLC, are analytical techniques used to separate, identify and quantitate components of complex mixtures including biological samples such as proteins and lipids as well as chemical mixtures of pesticides, drugs and oils. Both techniques are liquid chromatographic methods but differ by operating pressures (HPLC < 6000 psi < UHPLC ). Components of HPLC and UHPLC systems include columns, detectors, pumps, autosamplers and column heaters. Explore a range of UHPLC and HPLC columns for your specific sample needs including reverse phase, normal phase, ion exchange, HILIC, ion exclusion and size exclusion columns. For more specialized HPLC, explore FPLC, countercurrent LC and simulated moving bed systems. Find the best UHPLC and HPLC equipment in our peer reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.LC-MSLC-MS (liquid chromatography-mass spectrometry) systems and equipment are used for separation and quantitative analysis of complex mixtures, combining liquid chromatography and mass spectrometry. Quantify proteins, contaminants, pesticides or screen for drug metabolites with a high level of sensitivity. LC-MS systems and equipment include reverse phase, normal phase and specialized columns integrated with various MS detectors such as time-of-flight (TOF), quadrupole, orbitrap or ion trap mass analyzers. LC-MS/MS instruments equipped with a qTOF or triple quadrupole analyzer give greater sensitivity and resolving power to your analysis. Find the best LC-MS equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.HematologyIn Haematology / Hematology, complete blood cell counts (or full blood counts) are obtained using automated blood count analyzers to enumerate blood cell types.  Hematology also encompasses haemostasis and coagulation, thrombophilia and hemophilia, plasma viscosity and ESR analysis, hemoglobinopathies, cell morphology and haematinic measurement.Clinical ChemistryBiochemistry (or clinical chemistry) involves the analysis of bodily fluids using chemical tests. Techniques used include HPLC, chromatography, spectroscopy, mass spectrometry, immunochemical, electrophoresis, turbidometric / spectrophotometric assay, MRI and ISE analysis. Tests are often carried out on plasma or serum but urine (urinalysis) and fecal specimens are also processed.Toxicology / Drugs of Abuse TestingToxicology and Drugs of Abuse Testing is the investigation into toxic and illegal substances found at the scene of a crime or from a suspect and / or victim associated with a scene of a crime. Analyzers, immunoassays and drugs of abuse test kits and presumptive test kits are an essential aspect of toxicology investigation.GC-MS GC-MS (gas chromatography-mass spectrometry) instruments and equipment are used to separate, quantify and identify mixtures of small and volatile compounds, such as polycyclic aromatics, fatty acids and alcohols. Often used in drug detection, forensic investigation and environmental analysis for pesticides and contaminants, GC-MS is a powerful addition to your lab’s analytical capabilities. GC-MS/MS instruments equipped with a qTOF or triple quadrupole analyzers can give greater sensitivity and resolution to your analysis. Find the best GC-MS instruments and equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.BenzodiazepinesClinical Mass SpectrometryMass spectrometry is emerging as a superior method of analysis over the longstanding, gold standard of immunoassay. Clinical mass spectrometry systems are increasingly accessible to medical laboratories and are capable of providing results with more speed and less expense than traditional methods. From simple mass spectrometers to IVDR class A compliant, highly sophisticated systems performing liquid chromatography tandem mass spectrometry (LC/MS/MS), find the latest product news, reviews and resources to make a purchasing decision for your laboratory.