Gas Chromatography - Mass Spectrometry

Powerful Analysis Through Separation and Identification

Gas Chromatography–Mass Spectrometry (GC-MS) is a well-established hyphenated analytical technique that integrates the separation capability of gas chromatography with the molecular identification power of mass spectrometry. Because GC-MS combines both separation and detection within a single analytical workflow, it is widely regarded as a primary method for both qualitative characterization and quantitative determination of complex mixtures. Its sensitivity and selectivity make it indispensable for detecting trace-level impurities, profiling volatile organic compounds, and confirming molecular composition across diverse applications, including pharmaceuticals, chemical manufacturing, food and beverage analysis, cosmetics, and consumer product testing.

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How GC-MS Works

A sample is introduced into the gas chromatograph where it is volatized, and its analytes are separated according to their boiling points and their interaction with the stationary phase of the capillary column. As a compound elutes sequentially from the column, it is introduced into the mass spectrometer, where each undergoes ionization and fragmentation. The resulting ions are then resolved according to their mass-to-charge (m/z) ratios, producing characteristic spectra that enable unequivocal compound identification.

Application

Practical Uses of GC-MS:


  • Detect trace and volatile organic compounds in mixtures
  • Identify unknown impurities, off-odors, or contaminants
  • Support deformulation, extractables, and residual solvent testing

Benefits

Why This Technique Matters:


  • Provide high sensitivity with accurate compound identification
  • Generate data that meets regulatory scrutiny in many industries
  • Reduce time and resources by detecting multiple targets in one run


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