Mobile spectrometry - Glossary

Mobile spectrometry is portable mass spectrometry designed for field use. For peptide testing, it is not validated as a reliable standard compared to stationary laboratory LC-MS (Liquid Chromatography-Mass Spectrometry) methods. When reviewing a lab report or Certificate of Analysis (COA) for peptides, the instrument used directly determines the reliability of the results.

Mobile spectrometry measures molecular mass in a portable format

Mobile spectrometry identifies and quantifies chemicals by measuring the mass-to-charge ratio of charged molecules. The instrument consists of three core parts: an ion source, a mass analyzer, and a detector. While stationary lab equipment requires high-vacuum infrastructure, mobile versions are miniaturized and battery-operated for field readiness.

This portability comes with practical limitations. Published comparisons show that portable MS (mass spectrometry) devices have significantly lower sensitivity and poorer accuracy than standard benchtop instruments. How large the gap is depends on the compound and the instrument, but it is substantial. In practical terms, mobile devices are more likely to miss trace impurities, which is critical when a Certificate of Analysis (COA) is used to judge peptide or research-chemical quality.

Mobile spectrometry is often confused with other methods

Mobile spectrometry is not the same as standard benchtop LC-MS or GC-MS systems used in professional laboratories.
Mobile spectrometry is not the same as handheld near-infrared (NIR) or Raman spectroscopy, which are optical techniques that measure light interactions rather than molecular mass.
Primary peptide-quality literature supports stationary LC-HRMS (High-Resolution Mass Spectrometry) or LC-MS/MS for validating peptide identity, sequence, and purity, rather than mobile MS.

Mobile spectrometry measures molecular mass in a portable format

Mobile spectrometry is often confused with other methods

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