JPS61160056A - Identification of malodorous component - Google Patents

Abstract

PURPOSE:To make it possible to certainly detect a different kind of malodorous components discharged intermittently, by subjecting the components of the specimen separated and collected by chromatography to a smell test. CONSTITUTION:When the values 10a of gas collectors 8a, 8b... are opened to from the carrier gas from a carrier gas source 3, the tetrabags 12a, 12b... in pressure containers 11a, 11b... are shrunk. Subsequently, when a specimen is injected from a specimen injection port 2, the specimen is separated into components and, when the peak values of the concns. of said components are detected, solenoid valves 10a, 9a are respectively closed and opened to return the container 11a to atmospheric pressure and the first component is collected by the bag 12a from a simultaneously opened solenoid valve 13a and, subsequently, said valve 13a is closed. In the same way, the components are successively collected by the bags 12b, 12c... to be subjected to a smell test. Therefore, the test is performed after paralysis due to a strong malodorant component was released regardless of the separation speed by a gas chromatograph and a different kind of malodorous components discharged uninterruptedly can be certainly detected and identified.

Description

[Detailed description of the invention] B. Fields of application of technology The present invention relates to a method for identifying odor components.

However, it is said that the most reliable method for analyzing components that stimulate an animal's sense of smell is to use the animal's own sense of smell as a sensor.

For this reason, a sample is separated into its constituent components using gas chromatography, and this is quantitatively analyzed using a physical and chemical detector such as a hydrogen flame ionization detector, while in parallel detection is performed using the animal's sense of smell.

However, animals, especially humans, have a highly paralyzed sense of smell, so immediately after smelling a strong odor component, they are unable to distinguish between weak odor components, resulting in detection errors.

C. Objectives In view of these problems, it is an object of the present invention to propose a method for identifying odor components that can reliably detect different types of odor components that are continuously released.

21. The structure of the invention, that is, the feature of the present invention is that the components separated by gas chromatography are individually collected and subjected to an olfactory test when the sense of smell has been recovered.

E. Embodiments Therefore, details of the invention will be explained below based on illustrated embodiments.

FIG. 1 shows an example of an apparatus used in the present invention, in which one end is connected to a carrier gas source 3 via a sample injection port 2, and the other end is connected to a branch pipe 4. This is a gas chromatography column that separates the sample injected from the sample injection port 2 into its components. Reference numeral 5 denotes a hydrogen flame ion ratio detector connected to one outlet of the branch pipe 4, which converts the separated component concentration into an electrical signal and outputs it to a recorder 6 and a peak detector 7 that opens and closes a valve to be described later. It is something. 8a, 8b, 8C... are gas collectors connected to the other outlet of the branch pipe 4, and the air is collected through valves 9a, 9b, 9C... which are sequentially opened in response to a peak detection signal. and pressure vessels 11a, 11b, ll, which also communicate with the carrier gas source 3 via valves 10a, 10b, loc...
c... Tetra bags 12a, 12 for gas collection inside
b.

12c...accommodates tetrabags 12a, 12b
, 12c... are connected to stop valves 13a, 13, respectively.
b, ``3c...'' is configured to be connected in parallel to the branch pipe 4. Note that 14 indicates a valve connected to the inspection section.

Next, the operation of the apparatus configured as described above will be explained.

Valves 10a, 10 of gas collectors 8a, 8b, 8c...
b, lOC...open, valves 9a, 9b, 9C...
When the carrier gas is flowed from the carrier gas source 3 with ・ closed, the tetra bags 12a, 12b, 12c...
・contracts under the pressure of carrier gas. When a sample is injected from the sample injection port 2 in this condition,
The sample is separated into components and flows out from the outlet side. Detector 5 detects the separated components and outputs signals to recorder 6 and peak detector 7. When the peak of the first component separated in this way reaches, the peak detector 7 outputs a signal to close the solenoid valve 10a, open the solenoid valve 9a to return the pressure vessel 11a to normal pressure, and at the same time Valve 13
Let a be open. As a result, the first F& portion flows into the tetra bag 12a via the branch pipe 4 and is collected. The valve 12a is closed when the collection of the first component is completed. When the peak of the second component is detected after a predetermined period of time has elapsed, the valve 10b is closed and the valve 9b is opened to return the pressure vessel 11b to normal pressure, and at the same time, the valve 13b of the second collector is opened. Tetra bag 1
2b collects the second component.

Thereafter, each component is collected while repeating this operation every time a new peak appears.

When all the components of the sample have been collected, the valve 14 is opened to communicate with the olfactory test section □. In this situation,
When the valve 12a of one collector 8a is opened, the valve 10a is simultaneously opened, and the valve 9a is closed, and carrier gas pressure is applied from the outer periphery of the tetrabag L2a, the collected components are sent through the pipe to the olfactory test. It is discharged to the department. The odor of this excreted component is identified by the animal's sense of smell. At this time, the concentration of the ingredients may be high or the irritation may be strong enough to paralyze the sense of smell. In such cases, the test should be repeated until the sense of smell has recovered. When the sense of smell has recovered after a predetermined period of time has elapsed, a test is performed by discharging the component gas from the next collector 8b.

In this way, tests are conducted one after another while always waiting for the sense of smell to return to normal.

FIG. 2 shows another apparatus used in the present invention, in which the collector is composed of columns 15a, 15b, L5C, . . . filled with adsorbent, and columns 15a, 15b, 15c, .
... One end is the valve 16a, 16b.

16c... to the branch pipe 4, and the other end to the valve 17a,
17b, 17c, etc., and the piping can be simplified and the apparatus can be configured compactly.

As explained above, according to the present invention, each of the multiple components separated by the gas chromatograph is collected and then sent to the olfactory test, regardless of the separation speed by the gas chromatograph. Not only can odor components be identified with a high degree of accuracy by keeping the sense of smell in the best condition, but it also makes it possible to perform multifaceted tests by changing concentrations and mixing with other components.

[Brief explanation of drawings]

FIGS. 1 and 2 are configuration diagrams showing an example of an apparatus used in the present invention.

Claims (1)

[Claims] An odor component identification method characterized by separating a sample by chromatography, collecting each component, and subjecting the collected components to an olfactory test.