Electrospray ion source

• US 20020117629A1
• Filed: 12/12/2001
• Published: 08/29/2002
• Est. Priority Date: 12/12/2000
• Status: Abandoned Application

• Current Assignee: JEOL Limited
• Original Assignee: JEOL Limited
• Inventors: Fujimaki, Susumu, Tamura, Jun
• Application Number:
  US10/020,005
• Publication Number:
  US 20020117629A1
• Time in Patent Office: Days
• US Class Current: 250/423R
• CPC Class Codes: H01J 49/165 Electrospray ionisation

Abstract

An electrospray ion source is fitted with plural spray nozzles. A nebulization gas is supplied to the nozzles. The supply of the nebulization gas to at least a selected one of the spray nozzles is cut off for a given time. The application of the high voltage to the spray nozzle, for which the supply of the nebulization gas is cut off, is synchronously ceased.

Claims

1. An electrospray ion source having plural spray nozzles which can be supplied with a nebulization gas and to which a high voltage can be applied, said spray nozzles being used substantially simultaneously,

wherein the supply of said nebulization gas to at least a selected one of said spray nozzles is cut off for a given time.

4. The electrospray ion source of claim 1, 2, or 3, wherein said plural spray nozzles are two in number.

5. The electrospray ion source of claim 1, 2, or 3, wherein at least one of said plural spray nozzles is a spray nozzle for a standard substance.

2. An electrospray ion source having plural spray nozzles to which a high voltage can be applied, said spray nozzles being used substantially simultaneously,

wherein the application of said high voltage to at least a selected one of said spray nozzles is ceased for a given time.

3. An electrospray ion source having plural spray nozzles which can be supplied with a nebulization gas and to which a high voltage can be applied, said spray nozzles being used substantially simultaneously,

wherein an operation for cutting off the supply of said nebulization gas to at least a selected one of said spray nozzles for a given time and an operation for ceasing the application of said high voltage to at least a selected one of said spray nozzles for a certain time are carried out synchronously for the same selected spray nozzle.