Mass spectrometer

Details Mass spectrometer Mass spectrometer

H - Electricity

01

J

H01J 49/10 (2006.01) H01J 49/16 (2006.01) H01J 49/26 (2006.01)

Patent

CA 2466552

An Atmospheric Pressure Chemical Ionisation ion source is disclosed wherein the current applied to a corona needle 2 is repeatedly varied between two or more settings during a single experimental run or acquisition. Two or more separate sets of mass spectral or mass analysed data are obtained. The ion source in one embodiment comprises a heated tube 1 arranged to discharge gas and analyte into a housing 7 enclosing corona needle 2. The housing 7 comprises a gas outlet port 3 via which analyte ions exit. According to another embodiment the corona needle does not have to be enclosed within a housing.

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