A mass spectrometer of reduced size and weight is provided which is capable to conduct highly accurate mass spectroscopy. The controller determines an indication of radio frequency bandwidth availability based on a given one of the control inputs. The peptide-ionic metal complex is comprised of an ionic metal selected from copper or tin and salts thereof, and the peptide component can be a acid, base, enzymatic, bacteria, or yeast hydrolyzate casein, collagen, elastin, meat products, silk protein, soybean protein, or other proteins or a chemically synthesized peptide that binds ionic metals, such as copper. The optical subassembly is disposed between the leg portions without in contact with the bridge. The spool is displaced against the spring load in response to a pressure difference between the first and the second pilot port, whereby a control surface of the spool is arranged to restrict the fluid flow through the valve when the control surface approaches a central cavity. The components of a formulation may be stored in each of the individually sealed assembly units while the assembly units remain sealed and then assembled into a multi-compartment container.