JP2001242153A - Deodorizing performance measuring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and device for accurately and simply measuring the deodorizing performance of a deodorizing material, placed in the flow of a high concentration of odoriferous gas at a low speed. SOLUTION: In the method for measuring the deodorizing performance of a deodorant sample, a prescribed concentration of odoriferous gas is passed through the deodorant sample placed in columnar sealed container by a suction system to measure the concentration of the odoriferous gas after the passage by a gas-detecting tube. The deodorizing performance measuring device is provided with a container (1), filled with an odorous gas, the column-shaped sealed container (2) in which a deodorant sample (5) is placed, a gas-detecting tube (3), and a suction device (4), and they are connected with each another, in this order.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method for measuring the deodorizing performance of a deodorant sample and an apparatus therefor.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. H4-262247 discloses an apparatus and a method for measuring the life of a deodorant by generating an air stream of a low-concentration odor gas and placing a deodorant in the stream. But,
It measures the deodorizing ability of a deodorant placed in an odor gas with a very low concentration of 1 to 1000 ppb, which formed an airflow having a relatively high flow rate of 10 to 100 cm per second, and its life. It is convenient for performance evaluation when deodorizing / deodorizing materials are applied to air conditioning equipment, etc., but it is necessary to use deodorizing / deodorizing materials to measure the deodorizing ability for odors continuously generated from the human body. There was a problem that the slip was large.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for accurately measuring the deodorizing performance of a deodorant material placed in a stream of a high-concentration odor gas at a lower speed. It is an object of the present invention to provide a method for measuring the deodorizing performance of a deodorized sample, which can easily carry out the deodorizing ability measurement without relying on the rectifying device, the odor sensor and the data conversion device.

[0004]

According to the present invention, an odor gas having a predetermined concentration is passed through a deodorant sample placed in a column-shaped closed container by an intake system, and the odor gas concentration after passing through the gas detection tube. The present invention relates to a method for measuring the deodorant performance of a deodorant sample, which is measured by the following method.

Further, the present invention comprises an odor gas-filled container 1, a column-shaped closed container 2 in which a deodorant sample 5 is installed, a gas detection tube 3, and an air intake device 4, each of which is connected in this order in deodorizing performance. It relates to a measuring device.

[0006]

FIG. 1 shows one embodiment of a measuring apparatus used in the present invention. First, an odor gas of a certain concentration is sealed in the odor gas filling container 1 in advance. As this container, a Tedra bag having no gas adsorption is preferable. As the odor gas, lower fatty acids which are the main factors of human body odor components, such as acetic acid, isovaleric acid, ammonia and mercaptan, etc., which are considered to be the cause of odor in daily life at a predetermined concentration (preferably 0.5 to 500 ppm, More preferably 1 to 300
ppm). The container 1 is connected, for example, to a column-shaped closed container 2 in which a deodorant sample 5 is installed through a cock having no gas adsorption property. This container needs to have a low gas adsorption and a high airtightness, and to have two entrances and exits to and from the outside only through the entrances and exits. That is, the odor gas flowing from the container 1 into the container 2 via the cock passes through the deodorant sample 5 and reaches the outlet on the opposite side. Further, it is convenient that the container 2 can be opened and closed at one location so that the deodorant sample 5 can be easily taken out or replaced.

The deodorant sample used in the present invention includes:
Examples include deodorants such as activated carbon, and deodorant fibers having a fiber form.

FIG. 2 shows an example of the deodorizing performance measuring apparatus of the present invention when the deodorizing sample is in a fiber form. A fibrous deodorant sample 6 is stretched along the inner peripheral surface of the container 2. The gas flowing into the container 2 always passes through the fibrous deodorant sample 6 uniformly and reaches the outlet on the opposite side of the fiber. In this case, the fibrous deodorant sample 6 is a cloth stretched so as to partition the inside of the container 2. This may be a dry state or a state containing a certain amount of water, and may be fixed so as to completely separate the inside of the container into two. Further, it is necessary to use a cloth having a constant area every measurement, that is, a cloth having no irregular wrinkles or the like. Irregular wrinkles in the fabric cause differences in the area, leading to measurement error. In the above case, the cross-sectional area of the container 2 is preferably 10 to 10,000 mm ² .

Next, the gas flows into the gas detection tube 3.
Various types of gas detection tubes 3 are appropriately used depending on the type and concentration of gas. The gas concentration of the gas detection tube 3 is read, and the difference between the gas concentration and the concentration of the gas sealed in the container 1 is calculated as the deodorizing rate of the deodorizing sample. The suction device 4 is installed on the detection tube 3 at a position opposite to the deodorant sample. According to this, preferably, 50 to 100 mL can be accurately suctioned at a time. Further, since the suction is performed through the narrow detection tube, the gas suction speed can be made substantially constant. The gas flow rate is preferably adjusted to an arbitrary flow rate of 50 to 150 mL / min depending on the type of the detection tube. Thereby, an error due to the influence of the flow rate of the odor gas passing through the deodorant sample can be reduced to a negligible level. In addition, the suction can be performed not only once but also many times, and accordingly, the amount of gas passing through the deodorant sample can be appropriately changed. By repeatedly contacting the deodorant sample with the odorous gas, the reversible adsorption of gas in the deodorant sample and the chemical deodorization show a large change in the measured value, and the reversible adsorption on the deodorant sample Can be suppressed low.

[0010]

EXAMPLE 1 First, 5 L of acetic acid gas having a concentration of 50 ppm was sealed in an odor gas-filled container (5 L Tedlar bag) 1 using the apparatus shown in FIG. Activated carbon was filled so that gas always passed through the activated carbon.
The gas detector tube 3 uses a gas tube 81L (for acetic acid) manufactured by Gastech Co., Ltd., and performs 100 mL suction 10 times (1000 mL in total) with the intake device 4 to measure the gas concentration and obtain the deodorization rate. Was.
Table 1 shows the results.

[0011]

[Table 1]

Example 2 The gas concentration was measured and the deodorization rate was measured in the same manner as in Example 1 except that ammonia gas having a concentration of 250 ppm was used instead of acetic acid gas, and that a detection tube for ammonia gas (3M) was used. I asked. Table 2 shows the results.

[0013]

[Table 2]

Example 3 Using the apparatus shown in FIG. 2, 5 L of acetic acid gas having a concentration of 40 ppm was sealed in a container (5 L Tedlar bag) 1 filled with odor gas, and a fibrous deodorant sample 6 was filled in a column-shaped closed container 2. A cotton cloth was fixed so that gas always passed through the cloth. Cloth treated with a deodorant (zinc oxide 10
g, 4 g of Emulgen 220 (manufactured by Kao Corporation) and 1 L of ion-exchanged water are applied to cotton fibers, squeezed so that the weight of the applied solution becomes the same as that of the cotton fibers, and then dried. And a non-processed fiber cut out into a circle having a diameter of 60 mm). Thereafter, the gas concentration was measured in the same manner as in Example 1 to determine the deodorizing rate. Table 3 shows the results.

[0015]

[Table 3]

Example 4 A gas concentration was measured in the same manner as in Example 3 except that ammonia gas having a concentration of 30 ppm was used in place of acetic acid gas and a detection tube for ammonia gas (3 L) was used, and the deodorization rate was obtained. Was. Table 4 shows the results.

[0017]

[Table 4]

Example 5 A deodorant-treated cloth and an untreated cloth were used in the same manner as in Example 3 except that 50% by weight of water was contained in the cloth, except that acetic acid gas having a concentration of 300 ppm was used as acetic acid gas. In the same manner as in Example 3, the gas concentration was measured and the deodorizing rate was determined. Table 5 shows the results.

[0019]

[Table 5]

Example 6 The gas concentration was measured and the deodorization rate was determined in the same manner as in Example 5 except that ammonia gas having a concentration of 50 ppm was used in place of acetic acid gas, and a detection tube for ammonia gas (3 L) was used. Was. Table 6 shows the results.

[0021]

[Table 6]

Comparative Example 1 Using the same deodorant-treated cloth and untreated cloth as in Example 3,
100 ppm of acetic acid gas together with 1 g of cloth was sealed in the L tedra bag, and the gas concentrations after 1 hour, 2 hours and 24 hours were measured to determine the deodorizing rate. Table 7 shows the results.

[0023]

[Table 7]

As is apparent from Table 7, no significant difference was observed between the deodorant-treated cloth and the untreated cloth.

Comparative Example 2 After 1 hour, 2 hours and 24 hours, the same procedure as in Comparative Example 1 was carried out except that a deodorant-treated cloth and a non-treated cloth containing 50% by weight of water with respect to the cloth were used. Was measured to determine the deodorization rate. Table 8 shows the results.

[0026]

[Table 8]

As is apparent from Table 8, no difference was observed between the deodorant treated cloth and the untreated cloth. At the end of the test, the inside of the Tedra bag was covered with water drops.

[0028]

According to the measuring method and apparatus of the present invention, the deodorizing performance of a deodorizing sample for all kinds of odorous gases can be measured simply, reproducibly and continuously. Further, accurate measurement can be performed even in a system in which moisture coexists.

[Brief description of the drawings]

FIG. 1 is a schematic view showing one embodiment of a deodorizing performance measuring device of the present invention.

FIG. 2 is a schematic view showing another embodiment of the deodorizing performance measuring device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Odor gas filling container 2 Column-shaped closed container in which deodorant sample was installed 3 Gas detector tube 4 Inhaler 5 Deodorant sample 6 Fibrous deodorant sample

Claims (7)

[Claims] 1. A deodorizing sample in which a predetermined concentration of odor gas is passed through an deodorizing sample installed in a column-shaped closed container by an air suction method, and the odor gas concentration after passing is measured by a gas detector tube. Deodorizing performance measurement method. 2. The deodorizable sample is in a fiber form.
The measurement method described. 3. The method according to claim 1, wherein the predetermined concentration of the odor gas is 0.5 to 500.
The method according to claim 1, wherein the amount is ppm. 4. The gas suction system according to claim 1, wherein the gas detection tube is configured to suction air from a direction opposite to that of the deodorant sample.
The measurement method according to any one of the above. 5. The flow rate of the odor gas is 50 to 150 mL / mi.
The measurement method according to any one of claims 1 to 4, wherein n is n. 6. An odor gas-filled container (1), a column-shaped closed container (2) in which a deodorant sample (5) is installed, a gas detection tube (3), and a suction device (4) are provided. Deodorizing performance measuring device connected in order. 7. A cross-sectional area of the column-shaped closed container equippedwith deodorant sample (2) is a 10～10,000Mm ^2, measuring device according to claim 6, wherein.