GAS INLET FOR AN ION SOURCE

摘要

The aim of the invention is to configure the gas inlet for an ion source in such a way that the point of expansion of the gas stream can be fed directly into the ion source of a mass spectrometer. To this end the invention provides for a capillary (1) for supplying a sample gas, a guiding tube which surrounds the capillary and contains a carrier gas, where the capillary opens into the guiding tube and the open end of said guiding tube ends in the ion source, a pulsed valve for supplying carrier gas to the guiding tube and a housing for holding the capillary, guiding tube and valve in a gas-tight manner, whereby the guiding tube protrudes from the housing.