Patent ID: 6649908
Filing Date: 2003-11-18
Classification: G01N,H01J

Abstract:
An apparatus for introducing a sample from a fluid streams into a mass analyzer comprising:a first chamber; a second chamber having a lower pressure than said first chamber and in fluid communication with said mass analyzer; a transfer capillary having two inlets located within said first chamber, said two inlets each in fluid communication with two inlet channels, said two inlet channels in fluid communication with an outlet channel, said outlet channel in fluid communication with an outlet, said outlet located within said second chamber; a multiplex selector that allows ions to flow from a selected subset of said two inlet channels into said outlet channel and out of said outlet, and that is capable of changing the set inlet channels comprising said selected subset; and two or more ionizers in fluid communication with said two fluid streams, wherein said ionizers generate ionized sample within said first chamber and direct said ionized sample into corresponding inlets of said transfer capillary.