Improvements to atmospheric pressure ion sources

H - Electricity – 01 – J

Patent

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H01J 49/10 (2006.01) H01J 49/04 (2006.01)

Patent

CA 2268448

An Atmospheric Pressure Ion (API) source (1) operates Electrospray (ES) and Atmospheric Pressure Chemical Ionization (APCI) modes. The API source (1) includes a multipurpose heater assembly (10) mounted in an API source chamber (6). The multipurpose heater assembly (10) supplies heat to an API chamber endplate (8) a bath gas, and an entrance end (24) of a capillary orifice (28) into vacuum. An additional heater (15) is at the exit end (32) of the capillary (11) into vacuum. The bath gas, endplate (8) and capillary entrance (24) temperature can set independent of gas flow rate.

Une source (1) d'ions à pression atmosphérique (IPA) fonctionne en mode d'électropulvérisation et en mode d'ionisation chimique à pression atmosphérique (ICPA). La source (1) IPA comprend un ensemble chauffant polyvalent (10) monté dans une chambre (6) de la source IPA. Cet ensemble chauffant polyvalent (10) envoie de la chaleur dans une plaque terminale (8) de la chambre IPA, un gaz de bain et une extrémité d'entrée (24) de l'orifice capillaire (28) à l'intérieur du vide. Un dispositif chauffant (15) additionnel est placé à l'extrémité de sortie (32) du capillaire (11) à l'intérieur du vide. La température du gaz de bain, de la plaque terminale (8) et de l'entrée (24) du capillaire peut être réglée indépendamment de la vitesse d'écoulement du gaz.

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