You can find used Chromatography & Mass Spectrometer on Wotol. The main manufacturers of Chromatography & Mass Spectrometer are Aijiren, Waters, Hewlett Packard (HP), Perkin Elmer, Shimadzu, Thermo, Dionex, Thermo Scientific, Varian, Thermo Finnigan, HP, AB Sciex, Aijiren Technologies, Metrohm. The main model : QP2010 ,CMI 900 XRF ,LCT API-LC