Agilent liquid chromatography - mass spectrometry (LC-MS) chromatography is a new generation of R & D Agilent 6120B single quadrupole mass spectrometer, with the latest Agilent 1200 HPLC online for integrated liquid chromatography - mass spectrometry analysis system . The instrument is the integrated liquid chromatography and mass spectrometer system use of separation and structure elucidation of one of the most widely used instrument for organic compounds, including natural products, drug molecules, metabolites, pesticides and veterinary drug residues and environmental contaminants.