Odor evaluation device, odor evaluation method and device for preparing gas for odor evaluation

Patent metadata

Field	Value
Publication number	US-12050208-B2
Application number	US-202117510745-A
Country	US
Kind code	B2
Filing date	Oct 26, 2021
Priority date	Nov 2, 2020
Publication date	Jul 30, 2024
Grant date	Jul 30, 2024

Abstract

An odor evaluation device, including: a gas chromatograph including a separation column configured to temporally separate a plurality of components contained in an odoriferous analysis-target gas; a timing detector configured to detect, for each of the plurality of components, a timing at which the component exits from the separation column; a gas collector configured to collect, into a sample bag, a gas containing all or some of the components exiting from the separation column when the analysis-target gas is passed through the separation column; a timing setter configured to allow a setting of a timing at which a component contained in the gas to be collected into the sample bag exits from the separation column; and a gas introducer configured to introduce a dilution gas into a passage connecting the separation column and the sample bag.

First claim

The invention claimed is:

1. An odor evaluation device, comprising:
a gas chromatograph including a separation column configured to temporally separate a plurality of components contained in an odoriferous analysis-target gas;
a first passage into which the plurality of components exiting from the separation column are introduced;
a timing detector configured to detect, for each of the plurality of components, a timing at which the component exits from the separation column;
a gas collector including an attachment port to which a sample bag is to be attached and a passage switcher configured to switch a condition of connecting the first passage and the attachment port, and configured to collect, into the sample bag, a gas containing all or some of the components exiting from the separation column when the analysis-target gas is passed through the separation column;
a timing setter configured to set a timing at which a component contained in the gas to be collected into the sample bag exits from the separation column based on a detection result of the timing detector; and
a second passage connected to the first passage at a position between the separation column and the passage switcher;
a gas introducer connected to the second passage and configured to introduce a dilution gas into the second passage.

2. The odor evaluation device according to claim 1 , wherein the gas collector includes: a plurality of attachment ports to which sample bags are to be attached, and an introduction port for introducing the gas containing all or some of the components exiting from the separation column into each of the sample bags respectively attached to the plurality of attachment ports; and
wherein the passage switcher configured to switch a passage connecting the plurality of attachment ports and the introduction port.

3. The odor evaluation device according to claim 1 , wherein the timing detector is a mass analyzer.

4. The odor evaluation device according to claim 1 , further comprising an odor measurement section including a plurality of odor sensors which differ from each other in response characteristics, for measuring an odor of the gas in the sample bag.

5. The odor evaluation device according to claim 1 , wherein:
the gas collector includes an attachment port to which a sample bag is to be attached; and
the odor evaluation device includes a sniffing port to be connected to the attachment port.

6. The odor evaluation device according to claim 1 , further comprising a controller configured to control the gas collector so as to collect, into the sample bag or one of sample bags provided in the gas collector, all components exiting from the separation column of the gas chromatograph when a first analysis-target gas is passed through the separation column, and a component exiting from the separation column at a predetermined timing among the components exiting from the separation column of the gas chromatograph when a second analysis-target gas is passed through the separation column, where a kind of the second analysis-target gas is a same as or different from a kind of the first analysis-target gas.

7. The odor evaluation device according to claim 1 , further comprising a controller configured to control the gas collector so as to collect, into the sample bag or one of sample bags provided in the gas collector, a component exiting from the separation column of the gas chromatograph at a predetermined timing among the components exiting from the separation column when a first analysis-target gas is passed through the separation column, and a component exiting from the separation column within a time range exclusive of the predetermined timing among the components exiting from the separation column when a second analysis-target gas which is different from the first analysis-target gas is passed through the separation column.

8. The odor evaluation device according to claim 1 , further comprising a controller configured to control the gas collector so as to collect, into a sample bag in which a predetermined gas is contained beforehand among the sample bags provided in the gas collector, a component exiting from the separation column of the gas chromatograph within a time range exclusive of a predetermined timing among the components exiting from the separation column when an analysis-target gas is passed through the separation column.

9. An odor evaluation method including steps of passing an odoriferous analysis-target gas through a separation column of a gas chromatograph, collecting, into a sample bag, a gas containing all or some of components exiting from the separation column when the analysis-target gas is passed through the separation column, and evaluating the gas in the sample bag, the method comprising:
a step of introducing a dilution gas into a second passage connected to a first passage connecting the separation column and the sample bag, the second passage connected to the first passage at a position between the separation column and the sample bag.

10. The odor evaluation method according to claim 9 , further comprising a step of collecting, into the sample bag, all components exiting from the separation column of the gas chromatograph when a first analysis-target gas is passed through the separation column, and a component exiting from the separation column at a predetermined timing among components exiting from the separation column of the gas chromatograph when a second analysis-target gas is passed through the separation column, where a kind of the second analysis-target gas is a same as or different from a kind of the first analysis-target gas.

11. The odor evaluation method according to claim 9 , further comprising a step of collecting, into the sample bag, a component exiting from the separation column of the gas chromatograph at a predetermined timing among components exiting from the separation column when a first analysis-target gas is passed through the separation column, and a component exiting from the separation column within a time range exclusive of the predetermined timing among components exiting from the separation column when a second analysis-target gas which is different from the first analysis-target gas is passed through the separation column.

12. The odor evaluation method according to claim 9 , further comprising a step of collecting, into the sample bag in which a predetermined gas is contained beforehand, a component exiting from the separation column of the gas chromatograph within a time range exclusive of a predetermined timing among components exiting from the separation column when an analysis-target gas is passed through the separation column.

13. The odor evaluation method according to claim 9 , further comprising a step of measuring an odor of the gas in the sample bag by using an odor measurement device including m odor sensors which differ from each other in response characteristics, where m is an integer equal to or greater than two.

14. The odor evaluation method according to claim 9 , further comprising a step of evaluating an odor of the gas in the sample bag by a sensory test using an olfactory sense.

15. A device for preparing a gas for odor evaluation, comprising:
a gas chromatograph including a separation column configured to temporally separate a plurality of components contained in an odoriferous analysis-target gas;
a first passage into which the plurality of components exiting from the separation column are introduced;
a timing detector configured to detect, for each of the plurality of components, a timing at which the component exits from the separation column;

Assignees

• Shimadzu Corp
• National Univ Corporation Iwate Univ

Inventors

• Kita Junichi
• Miyazaki Masao
• Kinoshita Motoo

Classifications

• G01N33/0001 Primary

  by organoleptic means · CPC title

• G01N2030/062

  extracting sample from raw material · CPC title

• G01N2030/8868

  elemental analysis, e.g. isotope dilution analysis · CPC title

• G01N2030/025

  Gas chromatography · CPC title

• G01N33/0018

  by diluting a gas · CPC title