JPH0518947A - Odor suction concentration comparison testing machine - Google Patents

Abstract

PURPOSE:To enable performance of a deodorizer at a low concentration to be measured by providing front and rear chambers which sandwich a sample chamber, allowing a as to flow from the front chamber through the sample chamber to the rear chamber, and quantitatively exposing the sample within the sample chamber to the gas. CONSTITUTION:A sample-placing plate is placed at nearly a center of a sample chamber 3 and a sample S is placed on it. Dampers 5 and 6 are placed at a boundary between a front chamber 2 and a rear chamber 4 above and blow the sample chamber 3. An area near connection pipes 11 and 12 at upper and lower edges are formed in conical shape to reduce turbulence of air flow. For example, when a nitrogen cylinder 20 is opened when measuring ammonium, the nitrogen gas is mixed with an odor by a permeator 21 and is sent to an odor suction concentration comparison testing machine 1. The odor gas is not sent to the sample chamber 3 through a bypass pipe 7 until the odor gas reaches a certain concentration. When the odor gas reaches a certain concentration, the gas is led to the sample chamber 3 and is exposed to the sample S. A concentration of odor before exposure is measured by a concentration- measuring equipment 22 and that after exposure is measured by a concentration- measuring equipment 23 and then both measurement values are compared, thus enabling performance of the sample to be known.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel odor adsorption concentration comparison tester for measuring the odor adsorption capacity of a deodorant.

[0002]

2. Description of the Related Art At present, in so-called livestock pollution, there is still a problem to be solved against malodor, and this solution is being eagerly promoted not only at the national and prefectural levels but also at the private level. Along with this, many deodorant agents have come to be marketed and distributed, but their effects are still unknown and it is difficult to compare them. It is required that the evaluation be performed with a highly reproducible method under certain conditions.

Conventionally, there is no dedicated measuring instrument of this kind, and the performance test of the deodorant has been carried out by using an Erlenmeyer flask or the like on a laboratory desk. FIG. 3 shows the typical experimental device. An odor generating source 33 is placed in the left flask 30, a sample 34 (deodorant) is placed in the central flask 31, and a detection tube 35 is attached to the right flask 32. The volume of each flask is 300-500 milliliters. When air is blown into the flask as shown in the figure,
The odorous air in the left flask 30 is exposed to the sample 34 in the central flask 31, and some of the odor is adsorbed to the sample 34. Further, the air moves to the flask 32 on the right side, is taken into the detection tube 35, and the concentration is measured.

[0004]

The above-mentioned conventional experimental apparatus lacks reliability because the measured values greatly differ each time an experiment is performed even if the same sample is used. It is considered that this is due to the following reasons. The amount of odor generated from the odor source varies rather than being constant. Since the flow of air in the flask changes depending on the shape and size of the flask, the thickness of the tube, the degree of insertion of the tube into the flask, the blowing speed of air, the temperature, etc., the status of exposure to the sample is always different. It will be. The error is large because the volume of the flask is small. Further, in the above experiment, since a high concentration (for example, 1000 to 10000 ppm of ammonia) that cannot be found in nature is used, it is considered that the deodorizing effect is different in the environment in which it is actually used (for example, 10 ppm of ammonia). The present invention solves such a problem, enables highly reliable and reproducible measurement, and can know the objective performance of the deodorant.

[0005]

The present invention is a vertical type tubular device having a front chamber and a rear chamber sandwiching a sample chamber in which a sample is installed, from a front chamber to a sample chamber and a rear chamber. It is an odor adsorption concentration comparison tester characterized by flowing gas and exposing the sample in the sample chamber quantitatively during this period. It is also possible to provide dampers in front of and behind the sample chamber of this tester and to provide a bypass from the front chamber to the rear chamber.

[0006]

In the tester of the present invention, gas is blown out from the pipe in the front chamber, where the turbulence of the air flow is adjusted and sent to the sample chamber. Further, since the gas that has passed through the sample chamber is sent to the pipe in the rear chamber, the turbulence of the air flow at this time does not affect the sample chamber. In the sample chamber, there is always a steady and regular air flow from the upper side to the lower side, and an ideal situation in which the gas is exposed to the sample from the upper side and escapes downward is realized. In addition, by installing dampers in front of and behind the sample chamber of this tester, and by providing a bypass from the front chamber to the rear chamber, gas can be diverted to the bypass when exchanging samples so that the test can be restarted quickly. You can return to the measurement environment. That is, in the case of continuous measurement, when the sample is exchanged, air flows into the sample chamber from the outside, and it takes a considerable time for the concentration to be lowered and to be restored to a predetermined concentration. If a bypass is provided, the gas in the sample chamber only changes, and the gas concentrations in the front chamber and rear chamber are kept constant, so the concentration in the sample chamber when the dampers before and after the sample chamber are opened. The recovery will be significantly faster.

[0007]

FIG. 1 is a side view of an odor adsorption concentration comparison tester 1 according to one embodiment of the present invention, and FIG. 2 is an explanatory view showing the entire test apparatus. The tester 1 has a substantially cylindrical shape as a whole and includes a front chamber 2, a sample chamber 3, a rear chamber 4, dampers 5 and 6, a bypass pipe 7, and the like. A sample tray (not shown) is arranged in the approximate center of the sample chamber 3, and the sample S is placed thereon. The sample is taken in and out by opening and closing the door 8. Dampers 5 and 6 are arranged above and below the sample chamber 3 at boundaries between the front chamber and the rear chamber, and are opened and closed by handles 9 and 10. Bamboo shoot pipes 11, 1 for pipe connection are provided at the upper end of the front chamber 2 and the lower end of the rear chamber 4.
2 is provided, and the vicinity thereof is formed in a funnel shape so as to reduce the turbulence of the air flow as much as possible. A bypass pipe 7 forms a bypass from the front chamber 2 to the rear chamber 4, and the valve 1
Open and close with 3. The sample is exchanged after opening the valve 13 and closing the dampers 5 and 6 to bypass the gas to the bypass.

The tester 1 is arranged, for example, as shown in FIG. In the figure, 20 is a nitrogen gas cylinder, 21 is a permeator (odor generator), and 22 and 23 are concentration measuring devices. As the concentration measuring device, for example, an indophenol blue method is used when measuring ammonia, and a hydrogen sulfide meter is used when measuring hydrogen sulfide. The reason why nitrogen gas is used as the carrier gas is to prevent noise from entering. When the nitrogen gas cylinder 20 is opened, the nitrogen gas is odorized by the permeator 21 and is sent to the odor adsorption concentration comparison tester 1. Since it takes time until the odorous gas reaches a constant concentration, it cannot be passed through the bypass pipe 7 to the sample chamber 3 until then. The predetermined time has passed,
When the odorous gas reaches a certain concentration, the passage is changed to introduce the gas into the sample chamber and expose the sample. The concentration of odor before exposure is measured by the concentration measuring device 22, and the concentration of odor after exposure is measured by the concentration measuring device 23.
It is possible to know the performance of the sample by making a measurement and comparing the two measured values.

[0009]

The odor adsorption concentration comparison tester of the present invention can always expose the gas to the sample in an ideal airflow state from the upper side to the lower side, so that the measured values vary depending on the time and place. It is possible to obtain reliable data. By providing a bypass like the example,
When testing a plurality of samples in succession, the test can be performed in a short time, which is extremely convenient.

[Brief description of drawings]

FIG. 1 is an odor adsorption concentration comparison tester 1 according to one embodiment of the present invention.
FIG.

FIG. 2 is an explanatory diagram showing the entire test apparatus.

FIG. 3 is an explanatory diagram of a conventional test apparatus.

[Explanation of symbols]

1 Odor adsorption concentration comparison tester 2 anteroom 3 sample chamber 4 rear room 5 damper 6 damper 7 Bypass pipe 8 doors 9 handle 10 handles 11 bamboo shoot pipe 12 Bamboo shoot pipe 13 valves 20 nitrogen gas cylinder 21 Permeator 22 Concentration measuring instrument 23 Concentration measuring instrument 30 flasks 31 flasks 32 flasks 33 Odor source 34 samples 35 Detector tube

Claims (2)

[Claims] 1. A vertical type tubular device having a front chamber and a rear chamber sandwiching a sample chamber in which a sample is installed, in which a gas is caused to flow from the front chamber to the rear chamber, and the sample chamber Odor adsorption concentration comparison tester characterized by quantitatively exposing gas to sample 2. An odor adsorption concentration comparison tester according to claim 1, wherein dampers are provided in front of and behind the sample chamber, and a bypass from the front chamber to the rear chamber is provided.