April 8, 2012 Mass Spec Portfolio Block Diagram http://www.google.com/imgres?um=1&hl=en&sa=X&biw=1366&bih=667&tbm=isch&tbnid=eXZuydgZJcfrYM:&imgrefurl=http://en.wikibooks.org/wiki/IB_Chemi stry/Atomic_Theory&docid=sS_9wnv2dR9DBM&imgurl=http://upload.wikimedia.org/wikipedia/commons/b/b8/Mass_spectrometer_schematics.png&w=338&h=33 0&ei=F12DT_S2Ku_I0AHD58CSCA&zoom=1&iact=hc&vpx=756&vpy=302&dur=2072&hovh=222&hovw=227&tx=102&ty=90&sig=104590239411057997335 &page=1&tbnh=117&tbnw=120&start=0&ndsp=16&ved=1t:429,r:8,s:0,i:84 Vendors Agilent Technologies Shimadzu Perkin Elmer Thermo Scientific Netzsch Pfeiffer Vacuum Articles Mass spectrometry of synthetic polymers. Peacock, P., McEwen, C. Analytical Chemistry. 2006. 78(12):3957-3964. Structural mass spectrometry in protein therapeutics discovery. Kim, Y., Doyle, M. Analytical Chemistry. 2010. 82(17):7083. Direct Dynamic Protein-Affinity Selection Mass-Spectrometry. Jonker, N., Lingeman, H., Irth, H. Chromatographia. 2010. 72(1):7-13. Common Uses A mass spec is mainly used for determining the masses of charged particles and the elemental composition of a molecule or sample. A mass spec can be used as a detector for most analytical instrument as way to determine their composition.