Gas chromatograph

Patent metadata

Field	Value
Publication number	US-10458961-B2
Application number	US-201715665753-A
Country	US
Kind code	B2
Filing date	Aug 1, 2017
Priority date	Aug 1, 2017
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

Provided is a gas chromatograph including a column which separates a sample; a detector which is configured to alternately introduce a carrier gas containing a sample component separated by the column and a carrier gas alone into a detection unit by changing an inflow point of the carrier gas to acquire a signal; an analysis information input unit with which analysis information is input; a data retaining unit which retains data indicating a relationship between a column flow rate and a carrier gas flow rate which is obtained in advance; and calculation unit which is configured to calculate the carrier gas flow rate on the basis of the analysis information input from the analysis information input unit and calculate the carrier gas flow rate according to the calculated column flow rate by using the calculated column flow rate and the data retained in the data retaining unit.

First claim

What is claimed is:

1. A gas chromatograph comprising:
a column for separating a sample into components;
a detector connected to downstream of the column, the detector including a detection unit for detecting the components of the sample separated by the column;
first and second introducing channels which are each arranged to introduce a carrier gas into the detector;
a switch for selecting one channel through which the carrier gas is introduced into the detector between the first introducing channel and the second introducing channel so that the carrier gas containing the components or the carrier gas alone is selectively introduced into the detector;
a pressure regulator for regulating a flow rate of the carrier gas introduced into the detector through the first introducing channel or the second introducing channel;
a control unit configured to control the pressure regulator;
an analysis information input unit with which analysis information is input;
a data retaining unit which retains data indicating a relationship between a preliminarily-set column flow rate and a carrier gas flow rate which is a flow rate of the carrier gas which is to be introduced into the detector; and
a calculation unit which is configured to calculate the column flow rate on the basis of the analysis information input from the analysis information input unit and calculate the carrier gas flow rate according to the calculated column flow rate by using the calculated column flow rate and the data retained in the data retaining unit, wherein
the control unit is configured to control the pressure regulator based on the calculated carrier gas flow rate.

2. The gas chromatograph according to claim 1 , wherein the analysis information is at least one of an inner diameter of the column, a length of the column, a temperature, and a pressure applied to the column.

3. The gas chromatograph according to claim 1 , wherein the gas chromatograph is configured to display the calculated carrier gas flow rate on a display unit, to input a carrier gas at the calculated carrier gas flow rate, or to perform both.

4. The gas chromatograph according to claim 2 , wherein the gas chromatograph is configured to display the calculated carrier gas flow rate on a display unit, to input a carrier gas at the calculated carrier gas flow rate, or to perform both.

Assignees

• Shimadzu Corp

Inventors

• Nakama Yuji
• Shibamoto Shigeaki
• Kashihara Minoru

Classifications

• G01N30/62 Primary

  Detectors specially adapted therefor · CPC title

• G01N2030/324

  speed, flow rate · CPC title

• G01N30/8658

  Optimising operation parameters · CPC title

• G01N2030/628

  Multiplexing, i.e. several columns sharing a single detector · CPC title

• G01N2030/625

  by measuring reference material, e.g. carrier without sample · CPC title