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Related Concept Videos

Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

652
Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
652
High-Performance Liquid Chromatography: Types of Detectors01:15

High-Performance Liquid Chromatography: Types of Detectors

369
The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte...
369

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Related Experiment Video

Updated: May 13, 2025

High-throughput and Comprehensive Drug Surveillance Using Multisegment Injection-Capillary Electrophoresis-Mass Spectrometry
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Practical Considerations for Implementing Targeted Mass Spectrometry for Urine Drug Testing in Clinical Laboratories.

Patrick D DeArmond1, Dustin R Bunch1

  • 1Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, 700 Children's Drive, Columbus, OH 43205, USA.

Clinics in Laboratory Medicine
|May 10, 2025
PubMed
Summary
This summary is machine-generated.

Tandem mass spectrometry (MS/MS) is a robust method for urine drug testing, but controlling variables in sample collection and analysis is crucial for accurate results. This review discusses key factors and best practices for reliable drug testing using MS/MS.

Keywords:
ComplianceDrugs of abuseInternal standardLC-MS/MSLiquid chromatographySample cleanupToxicology

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Area of Science:

  • Clinical Chemistry
  • Analytical Chemistry
  • Forensic Toxicology

Background:

  • Urine drug testing (UDT) demand has increased for compliance and immunoassay confirmation.
  • Tandem mass spectrometry (MS/MS) is widely adopted for UDT due to its robustness.
  • However, MS/MS is susceptible to preanalytical and analytical variables impacting accuracy.

Purpose of the Study:

  • To review critical factors in targeted MS/MS assays for urine drug testing.
  • To discuss drug metabolism and method development considerations.
  • To provide best practice guidelines for controlling variability in MS/MS analysis.

Main Methods:

  • Literature review of targeted MS/MS assays for UDT.
  • Discussion of preanalytical factors (e.g., sample collection, storage).
  • Analysis of analytical factors (e.g., method development, validation).

Main Results:

  • MS/MS methodology is powerful but requires careful control of numerous variables.
  • Drug metabolism pathways significantly influence assay interpretation.
  • Method development and validation are critical for assay specificity and sensitivity.

Conclusions:

  • Optimizing preanalytical and analytical steps is essential for accurate UDT with MS/MS.
  • Adherence to best practices minimizes sample-to-sample variability.
  • Standardized protocols enhance the reliability of MS/MS in clinical and forensic toxicology.