JPH0584843U - Dissolution test container - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate the pretreatment operation of the dissolution test and eliminate the variation in the analysis value due to contamination and air diffusion. [Constitution] A sample and pure water are put into an Erlenmeyer flask 1 with a screw cap, and a Teflon liner cap 2 is attached with an opening / closing cock 3 closed. After stirring and leaving still, the syringe barrel 6 and the filter holder 8 are attached, and the opening / closing cock 3 is opened.
Push in the plunger of the Erlenmeyer flask with screw cap 1
The inside becomes a positive pressure, and the supernatant liquid is filtered by the filter 7 through the outflow pipe 5. Therefore, it is not necessary to remove the Teflon liner cap 2, and the analysis value due to contamination or air dispersion does not vary.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dissolution test container used for pretreatment of a dissolution test of volatile organic substances contained in solid matter.

[0002]

[Prior Art]

 Dissolution test methods are used for the analysis of metals and organic substances in solids. This elution test method is a method in which a solid substance is dispersed in purified water and shaken or stirred for a certain period of time to analyze the components eluted in the purified water. In addition, the atmosphere of the laboratory in which such analysis is performed is often contaminated with organic solvents. For the elution test method for volatile organic substances, a fixed amount of solid matter is placed in an Erlenmeyer flask with a screw cap, the flask is gently filled with purified water, stirred for a certain period of time using a magnetic stirrer, and allowed to stand for several tens of minutes. Put a part of the supernatant into the cylinder of a glass syringe, attach glass filter paper to the syringe, filter, and use the filtrate as a test solution. After the pretreatment operation, use n-hexane etc. as a solvent. After extraction, it is analyzed by an analyzer such as a gas chromatograph.

[0003]

[Problems to be solved by the device]

 However, in such pretreatment, in the case of using an ordinary Erlenmeyer flask with a screw cap or a glass syringe, after stirring for a certain period of time, there is a sample that does not precipitate and floats after standing for several tens of minutes. When the supernatant liquid after standing still was transferred to a cylinder and filtered, there was a drawback that it could not be filtered because it entered the gap between the cylinder and the plunger. In addition, when there are many samples, it is necessary to clean the glass syringe, which takes time and labor and may contaminate the test solution. Furthermore, when transferring from the triangular flask with screw cap to a glass syringe, the volatile organic substances in the supernatant liquid may diffuse and change the concentration, or the organic solvent in the room atmosphere may contaminate and contaminate. However, there is a problem that an accurate analysis value cannot be obtained especially in a highly sensitive analysis.

In view of the above problems, an object of the present invention is to collect a test liquid without opening the container used for stirring, and to prevent the glass syringe from being contaminated. It is intended to provide a dissolution test container capable of preventing the pollution of methane and the vaporization of volatile organic substances.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the dissolution test container according to the present invention comprises a container body having a wide upper end, a lid body hermetically attached to the opening of the body, and a container body penetrating the lid body. A pressurizing tube connected to an opening / closing cock and a removable pressurizing device, and a U-shaped outlet tube having an opening / closing cock and a removable filter holder on the lid, The U-shaped outflow pipe penetrates the lid airtightly and is inserted into the container.

[0006]

[Action]

 By attaching the cap 2 to the Erlenmeyer flask 1 with a screw cap and closing the opening / closing cock 3 of the pressurizing pipe 4 and the outflow pipe 5, the inside of the dissolution test container can be sealed and vaporization of volatile organic substances can be prevented. Further, the filter holder 8 holding the filter 7 is attached to the outlet side of the outflow pipe 5, the injection cylinder 6 is attached to the pressurizing pipe 4, the opening / closing cock 3 of the pressurizing pipe 4 and the outflow pipe 5 is opened, and the conical flask is opened. By making the inside of 1 have a positive pressure, the supernatant liquid flows out from the outflow pipe 5, passes through the filter 7, and is filtered.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view showing a dissolution test container according to an embodiment of the present invention. In FIG. 1, the dissolution test container is composed of an Erlenmeyer flask 1 with a screw cap as a container body having a wide open upper end, and a Teflon liner cap as a lid attached to the opening of the Erlenmeyer flask 1 with a screw cap. 2, an opening / closing cock 3, a pressurizing tube 4 attached to a Teflon liner cap 2 having a Luer lock type detachable injection cylinder 6, and an opening / closing cock 3 and a luer lock type detachable filter holder 8. It has an outflow pipe 5 inserted from the upper part of an Erlenmeyer flask 1 with a screw cap. A stirrer 9 for a magnetic stirrer is placed in an Erlenmeyer flask 1 with a screw cap for stirring. The container body may be cylindrical as long as it can be stirred and is stable, and the body and the lid may be not only the screw cap type but also the lid type if it is airtight. The body, lid, open / close cock 3, pressurizing pipe 4, outflow pipe 5, injection cylinder 6 and the like may be made of glass, Teflon or the like as long as they are airtight and solvent resistant. Further, the injection cylinder 6 may be used by connecting a discharge pump or the like by piping.

Next, the operation of this embodiment will be described. In the embodiment, the Teflon liner cap 2 was attached to the screw mouth of the Erlenmeyer flask 1 with the solid sample and the purified water put in the Erlenmeyer flask with a screw mouth 1 and the open / close cock 3 of the pressure pipe 4 and the outflow pipe 5 closed. Mounting. After stirring for a certain period of time using a magnet stirrer, the mixture is allowed to stand for several tens of minutes. After standing still, the pressure tube 4 and the outflow tube 5 are fitted with the filter holder 8 including the injection tube 6 and the filter 7, respectively, and the opening / closing cock 3 of the pressure tube 4 and the outflow tube 5 is opened to open the injection tube 6 When the plunger is pushed in, the supernatant passes through the outflow pipe 5 and the test solution filtered by the filter 7 is taken by a scale-equipped stopper operator (not shown) for pretreatment operation of the dissolution test. Be seen.

[0009]

[Effect of the device]

 As described above, the dissolution test container of the present invention does not require complicated operations such as transferring the supernatant liquid to a glass syringe and washing, and the test liquid can be easily collected. It has the effect of preventing the contamination of volatile substances and vaporization of volatile organic substances, and enabling accurate analysis.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

[Explanation of symbols]

 1 Erlenmeyer flask with screw cap 2 Teflon liner cap 3 Opening / closing cock 4 Pressurizing pipe 5 Outflow pipe 6 Injection cylinder 7 Filter 8 Filter holder 9 Stirrer

Claims (1)

[Scope of utility model registration request] 1. A container main body having a wide upper end, a lid body airtightly attached to the opening of the main body, an opening / closing cock that penetrates the lid body and communicates with the inside of the container body, and a removable A pressure pipe provided with a pressurizing device connected thereto; and a U-shaped outflow pipe provided with an opening / closing cock and a removable filter holder in the lid body, wherein the U-shaped outflow pipe hermetically seals the lid body. Is a penetrating test container and is inserted into the container.