Title:
ガスクロマトグラフィシステムのカラムヘッド圧を制御する方法およびシステム
Document Type and Number:
Japanese Patent JP4677247
Kind Code:
B2
Abstract:
Methods and system for sub-ambient pressure control for column head pressure in gas chromatography (GC) systems. The GC system includes an inlet and a capillary column connected to the inlet. The inlet includes a valve that regulates an inlet pressure and pressure sensor that measures the inlet pressure and outputs a signal that indicates a measured inlet pressure. The GC system also includes an inlet-pressure set-point that can be set to a negative pressure set-point representing a pressure below ambient pressure, the negative pressure set-point driving the valve to change the inlet pressure until the measured inlet pressure equals the negative pressure set-point.
Inventors:
Robert Sea Henderson
Application Number:
JP2005035491A
Publication Date:
April 27, 2011
Filing Date:
February 14, 2005
Export Citation:
Assignee:
AGILENT TECHNOLOGIES, INC.
International Classes:
G01N30/32; G01N30/60; G01N30/72; G01N30/86
Domestic Patent References:
| JP8233792A | ||||
| JP61018862A | ||||
| JP2002005912A |
Attorney, Agent or Firm:
Satoshi Furuya
Takahiko Mizobe
Kiyoharu Nishiyama
Takahiko Mizobe
Kiyoharu Nishiyama