LC-MS liquid chromatography-mass

GC-MS, gas chromatography-mass spectrometry, LC-MS, liquid chromatography-mass spectrometry. 

LC/MS liquid chromatography/mass spectrometry (single quadrupole)... 

Figure A.3A.2 Selection of chromatography-mass spectrometry system for the analysis of a sample. Abbreviations APCI, atmospheric pressure chemical ionization CF, continuous flow Cl, chemical ionization El, electron impact FAB, fast atom bombardment GC/MS, gas chromatogra-phy/mass spectrometry LC/MS, liquid chromatography/mass spectrometry.

LC/MS (Liquid Chromatography/Mass Spectrometry)—Chromatography system in which an HPLC is married to a mass spectrometric detector through an evaporated, ionizing interface. A variety of mass spectrometers are used to produce various LC/MS and LC/MS/MS configurations. MS detectors are universal, mass detectors that provide molecular weight information and can give a definitive identification of separated compounds. 

LC/MS Liquid chromatography/mass spectrometry. N/A Not analyzed (insignificant amount). 

This is another field in which the uninitiated can be overwhelmed by acronyms, so some of the most widely used ones are explained here HRMS = high-resolution mass spectrometry HRGC/HRMS = high-resolution gas chromatography/HRMS LC/MS - liquid chromatography/mass spectrometry Cl = chemical ionization FD = field desorption FAB = fast atom bombardment LDMS = laser desorption mass spectrometry. 

Recovery studies for (+)-catechin and (-)-epicatechin in synthetic wine solutions performed by HPLC revealed differences between these stereoisomers 79 % (-)-epicatechin was recovered compared to 97 % (+)-catechin [176]. We evaluated the use of ethyl acetate as extraction solvent in the analysis of extracts of hawthorn herb. Four subsequent extractions were performed and determinations were carried out in triplicate. From the total contents only 82 % (-)-epicatechin and 43 % procyanidin Cl could be recovered in the ethyl acetate extracts. The proportions of procyanidins B2 and B5 in the ethyl acetate extracts could not be determined because the peaks in the water phases were superimposed by matrix components. LC-MS (liquid chromatography mass spectrometry) analysis of the water phases however proved the presence of procyanidins B2, B5 and Cl besides other dimeric, trimeric and tetrameric procyanidins (see Fig. (4)).3... 

PLT = palytoxin, OST = ostreocins, LC-MS = Liquid Chromatography-Mass Spectrometry, HPLC = high performance liquid chromatography, HPCE = high performance capillary electrophoresis. 

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