Title:
SAMPLE INJECTOR FOR GAS CHROMATOGRAPHY
Document Type and Number:
Japanese Patent JP3267005
Kind Code:
B2
Abstract:
PURPOSE: To prevent lowering of sensitivity while enhancing reproducibility of quantitative analysis by preventing a gaseous sample, injected through a needle, from flowing over from a glass insert at a sample introducing part to the base end part thereby preventing the tailing of chromatogram peak.
CONSTITUTION: A glass insert 2 has the forward end part coupled with one of a capillary column 4 and the base end part provided with a carrier gas introduction pipe 6, a septum purge channel 10, and a septum 12 for injecting a sample by inserting the needle 14 of syringe of a sample injector 16. A pressure control section 20 takes in the output detected by a pressure sensor 18 and controls the carrier gas pressure through a pressure regulator 8, and at the same, controls the operation of the sample injector 16 and the injection timing of sample. The pressure control section 20 is operated according to a control program, to increase the inlet pressure of column linearly and keep it constant and injection of sample is ended during the pressure rise.
Inventors:
Koji Ohmiya
Application Number:
JP25924093A
Publication Date:
March 18, 2002
Filing Date:
September 22, 1993
Export Citation:
Assignee:
SHIMADZU CORPORATION
International Classes:
G01N30/32; (IPC1-7): G01N30/32
Attorney, Agent or Firm:
Shigeo Noguchi
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