Liquid chromatography mass spectrometry (LC/MS) is an important analytical tool of most analytical laboratories for the detection and quantitation of analytes that can be difficult to analyze by other methods such as GCMS. Compounds most amenable to LC/MS include polar molecules and thermally labile compounds. Spex provides a large catalog of multi-component LCMS compounds for the analyst to build their MS libraries, create QC samples and establish calibration curves.