JP3004007U - Powder sampling container and physical property measuring container - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a sampling container / physical property measuring container capable of sampling the powder and measuring the reflection spectrum of the powder, and keeping the amount of diffuse reflection constant during the measurement. [Constitution] The powder sampling container and the physical property measuring container are
A cap lid 5 in which a part of the bottom 2 is composed of a transparent glass plate 3
It consists of an attached container 1. The bottom 2 is a bottom lid screwed into the container body 1 side, and an O-ring is provided between the container body 1 side and the bottom lid body 6 side so that the transparent glass plate 3 closes the central opening of the bottom lid body 6. It is sandwiched through.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sampling container / physical property measuring container capable of sampling powder and measuring the reflection spectrum of the powder.

[0002]

[Prior art]

 In recent years, spectroscopic techniques have been developed and applied to the field of powder physical properties. By performing photometric analysis on the powder surface, it has become possible to measure the physical properties, which used to be difficult to measure, in an extremely simple manner.

For example, the amount of water in powder has been measured by the so-called loss on drying method. The sample was allowed to stand in a dryer at 105 ° C. for 1 hour to be in an absolutely dried state, and the amount reduced here was regarded as water to determine the weight% with respect to the sample amount. However, this loss-on-drying method requires a large dryer to measure a large number of samples, and has a long time when a small dryer is used, which is a complicated process (preparation → weighing drying). Since there is a need for cooling → weighing → discarding, there is a problem that the cost becomes high when it is automated.

As a method for solving these problems, the amount of water can be easily measured by measuring the diffuse reflection spectrum of water with near infrared light. If the range of this reflection spectrum measurement is extended to the infrared, ultraviolet, and visible light regions, not only the qualitative properties of the main components but also a wide range of information such as denaturation, deterioration, and coloring can be obtained. Therefore, the measurement of reflection spectrum is becoming an extremely important technique.

However, the measurement of the reflection spectrum also has a problem that it is difficult to make an accurate measurement because the amount of diffuse reflection differs depending on the powder particle size and the surface state of the powder aggregate state.

[0006]

The present invention has been made to solve the above-mentioned problems, and it is possible to sample the powder and measure the reflection spectrum of the powder, and the diffuse reflection amount is kept constant during the measurement. It is an object of the present invention to provide a sampling container and a container for measuring physical properties that satisfies the following requirements.

[0007]

[Means for Solving the Problems]

 As shown in FIG. 1 corresponding to the embodiment, a powder sampling container / physical property measuring container to which the present invention is applied, which is made to achieve the above object, has at least a part of a bottom 2 made of a transparent glass plate. It is composed of a container 1 with a cap lid 5 constituted by 3.

It is preferable that the transparent glass plate 3 is detachably attached to the container body 1.

As shown in FIG. 2, the sampling container / physical property measuring container of the present invention has a bottom 2 which is a bottom lid screwed into the container body 1 side, and a transparent glass plate 3 at the center of the bottom lid body 6. The O-ring 7 may be sandwiched between the container body 1 side and the bottom lid body 6 side so as to close the opening.

[0010]

[Action]

 Since the bottom 2 of the sampling container and the container for measuring physical properties is the transparent glass plate 3, when the incident light i is radiated from the outside toward the transparent glass plate 3, it passes through the transparent glass plate 3 and is reflected by the powder 9 in the container. The reflected light r can be measured externally.

[0011]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a powder sampling container / physical property measuring container to which the present invention is applied, as viewed from below. As shown in FIG. 1, the container 1 has a bottom 2 partially formed of a transparent glass plate 3 made of quartz glass, and a powder sample inlet can be closed with a cap lid 5. The bottom 2 is composed of a bottom lid screwed into the container body 1. As shown in FIG. 1, a transparent glass plate 3 is applied to the open lower end of the container body 1 via an O-ring 7, and a bottom lid body 6 having an opening in the center portion to cover it is attached to the container body 1. Screwed in. Therefore, the transparent glass plate 3 closes the central opening of the bottom lid body 6, and the container body 1 side and the bottom lid body 6 side are sealed. As the container body 1 and the bottom lid body 6, for example, various kinds of plastic, metal, ceramic, and glass can be used according to the properties of the powder to be sampled.

Ten sampling containers and containers for measuring physical properties configured as described above were prepared, and powder (hydroxypropylmethylcellulose) sample Nos. 1 to 10 having various water contents were formed in each container in a thickness of 2 cm from the bottom. Each of them was placed in the container, and the near-infrared ray i having a wavelength of 1.94 μm was applied to the powder sample 9 through the transparent glass plate 3 from the bottom of the container, and the reflected light r 1 reflected was measured in order by a photodetector. The water content was calculated from the measured amount of reflected light and is shown in Table 1 as the near infrared water content. For comparison, the moisture content of the same sample as the powder sample of each moisture content was measured by the loss on drying method, and is shown in Table 1 side by side. KJT-200 manufactured by Japan Tobacco Inc. was used for the measurement by the dry weight loss method.

[0014]

[Table 1]

Further, since the amount of diffuse reflection differs depending on the particle size of the powder and the amount of diffuse reflection differs depending on the surface state of the powder aggregate state, the powder sample is placed on the glass plate and diffused from the bottom of the glass plate. When the amount of reflection was measured, it was confirmed that if the thickness of the powder was constant and there was no gap between the glass plate and the sample powder, it was not related to the particle size of the powder and the surface condition of the powder.

Usually, the reflection spectrum is affected by the thickness of the powder, and the amount of the reflection spectrum decreases as the thickness of the powder increases, but the infrared, ultraviolet, and visible regions have some influence from the order of several hundreds of μm. In addition, in the diffuse reflection spectrum of water (1.94 μm), there was no effect from 1 cm or more.

[0017]

[Effect of device]

 As described above in detail, according to the powder sampling container and the physical property measuring container to which the present invention is applied, when the reflection spectrum is measured, the influence of the powder particle tendency is not affected, and the influence of the surface state is not affected. Since it does not receive the measurement, highly accurate measurement can be performed. Since it can also be used as a sampling container for powder samples and realizes extremely simple measurement, it is ideal for automation and its economic effect is great. Since there is no change in the properties of the powder after the spectroscopic measurement, it can be used as it is for other purposes.

Further, the sampling container / physical property measuring container of the present invention has a structure that can be easily disassembled, is easy to wash, and can eliminate contamination from other sources and influences from previous samples.

[Brief description of drawings]

FIG. 1 is a perspective view of a powder sampling container and a physical property measuring container to which the present invention is applied.

FIG. 2 is a sectional view of an essential part of the sampling container / physical property measuring container of the present invention.

[Explanation of symbols]

1 is a container body, 2 is a bottom, 3 is a transparent glass plate, 5 is a cap lid, 6 is a bottom lid body, 7 is an O-ring, 9 is a powder sample,
i is incident light, and r is reflected light.

Claims (3)

[Scope of utility model registration request] 1. A powder sampling container / physical property measuring container, characterized in that at least a part of the bottom is a container with a cap lid, which is made of a transparent glass plate. 2. The powder sampling container / physical property measuring container according to claim 1, wherein the transparent glass plate is detachably attached to the container body. 3. The bottom is a bottom lid screwed into the container body side, and an O-ring is provided between the container body side and the bottom lid body side so that the transparent glass plate closes the central opening of the bottom lid body. The powder sampling container and the physical property measuring container according to claim 1 or 2, wherein the powder sampling container and the physical property measuring container are sandwiched between the powder sampling container and the powder sampling container.