JPS645225Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an analytical enclosure tube structure suitable for efficiently pretreating samples for chemical analysis such as amino acids so that only the target substance can be applied to the analyzer. .

Conventionally, as an encapsulated tube for analysis, a glass tube 1 is used, as shown in the explanatory diagram of FIG. Substitute nitrogen with ^N2 or freeze to remove oxygen gas in the components. After the glass tube containing the sample was vacuum degassed, it was inserted into the injection port 1a.
The portion was sealed with a gas burner 3 or the like and formed into an ampoule.

In addition, in order to seal and preserve the analysis sample 2 injected into the glass tube 1, methods such as degassing by nitrogen substitution after freezing and hydrolysis are adopted, and pretreatment is required. It was desired to improve operational efficiency and mass-produce sampling.

However, with conventional sampling tubes, the tip of the sample 2 injected into the glass tube 1 is sealed using a gas burner 3, etc., but this method is difficult to operate and requires skill. was. In addition, the method for degassing the oxygen gas from analysis sample 2 was troublesome, and there were drawbacks such as poor hydrolysis due to insufficient gas replacement.

In addition, when performing an analytical test using a sealed tube containing the analytical sample 2, the tip of the sealed glass tube 1 is cut and attached to the analyzer.
Since the glass tube 1 cannot be reused and can only be used once, it has drawbacks such as being uneconomical and increasing costs.

This idea was made to improve the above-mentioned drawbacks of the conventional example, and it made the analysis enclosure tube an economical glass tube that could be used any number of times, simplified the analysis sample enclosure device, and made it possible to achieve the desired reaction. The purpose of the present invention is to provide an encapsulated tube structure for analysis that increases the temperature and ensures reliable sealing.

In order to provide the above structure, the present invention includes a glass tube for containing a sample, which has an elongated tip and a mouth that is slightly larger in diameter and thicker than the tip, and a gasket that is in contact with the lower surface of the mouth. a gasket receiver fitted over the tip of the glass tube and prevented from coming off by the gasket; a seal abutting the upper surface of the mouth so as to cover the mouth of the glass tube; An enclosure cap that is removably fitted to the gasket receiver, an on-off valve that is detachably attached to the enclosure cap, and the seal and the above-mentioned seal so that the inside and outside of the glass tube communicate with each other when the on-off valve is opened and closed. It is characterized by consisting of pores provided in the containment cap.

Examples based on this invention are shown below in Figures 2 to 4.
This will be explained in detail with reference to the drawings. FIG. 2 shows a glass tube 10 for enclosing a sample according to this invention, in which the tip 10a is elongated and the mouth 10b is the tip 10a.
It is somewhat larger in diameter and thicker than the original, and is made of tempered glass so that it can be washed and used many times. Figure 3 shows the above-mentioned glass tube 10 for inclusion.
After an analysis sample is injected into the chamber, the enclosure device 11 is attached and predetermined pretreatment operations such as degassing and nitrogen substitution are performed.

As shown in the exploded view shown in FIG. 4, the enclosure device 11 is composed of an enclosure cap 12 and an on-off valve 13, which are fitted in a sealing state to the opening 10b of the glass enclosure tube 10, and the enclosure cap 12 is a gasket. It is fitted into the opening 10b of the glass sealing tube 10 via the receiver 14, gasket 15, and seal 16.

The gasket receiver 14 is a somewhat elastic ring body having a male threaded portion 14a formed on its outer periphery and a stepped portion 14a formed on its inner periphery. This gasket receiver 14 is inserted over the tip 10a of the glass tube 10 by expanding its diameter using its elasticity. The enclosing cap 12 has a ring-shaped main body 21 which opens downward and has a U-shaped cross section, and has a female threaded portion 21a and a stepped portion 21b which are screwed into the male threaded portion 14a of the gasket receiver. gasket 15
As shown in FIG. 4, the ring is formed with a cut 15a so that the diameter can be expanded freely, and is inserted into the tip 10a of the glass tube 10 by expanding the diameter. This gasket 15 is the above-mentioned cut 15
In addition to the provision of the diameter a, it may be made of an elastic material and can be expanded in diameter.

The seal 16 has a small hole 16 penetrating in the vertical direction.
It is formed of a somewhat elastic disk with a point a located approximately in the center. The above-described fitting of the enclosure cap 12 causes the enclosure cap 12 to fit into the gasket receiver 1.
4, and in this state, the seal 16 is fitted into the step 21b in the enclosing cap and is attached to the upper surface of the mouth 10b of the glass tube so as to cover the glass tube mouth, and the gasket is The gasket 15 fitted into the stepped portion 14b in the receiver 14 is in close contact with the outer periphery of the lower surface of the mouth 10b of the glass tube. Further, above the main body 21 of the enclosure cap 12, an elongated cooling section 12b having a vertically penetrating pore 12a is provided.
is installed in a sealed state via a gasket.
Therefore, in this sealed state, when the on-off valve 13 is opened, the inside of the glass tube 10 communicates with the outside through the pores 12a and 16a. In addition, a plug 1 is placed above the on-off valve 13 via a spacer 17.
8 is attached and connected to a predetermined degassing device or gas replacement device (not shown).

Note that the groove 1 drilled on the lower surface of the seal 16 in the figure
6b is a groove for fitting a sealing member such as an O-ring as necessary.

When a desired sample is enclosed in the glass enclosure tube 10 using the enclosure tube 11 configured as described above, first, a predetermined amount of sample is injected into the glass enclosure tube 10, and then the enclosure device 11 is fitted. The interior of the glass sealing tube 10 is maintained in a preserved state by opening the on-off valve 13 and performing predetermined operations using a deaeration device or a gas replacement device. Opening/closing valve 1 after maintaining the inside of the glass enclosure tube 10 in a predetermined atmosphere
3 is kept closed, and when performing an analytical test, it is transferred to a testing device after hydrolysis, etc. is performed.

The glass tube 10 for encapsulation is optimally made of tempered glass that does not elute metal ions and can withstand heating of 110° C. or higher. In addition, since the tip of the glass tube is elongated to the mouth, it has the effect of cooling the vapor to an appropriate temperature when heated during hydrolysis, so that analytical tests can be carried out stably.

As explained in detail above, the analytical enclosure tube structure devised by this invention has a simple structure, facilitates the sampling operation, and does not require heat kneading such as welding the glass tube with a gas burner during the enclosure operation. No work is required, the sealing performance is good, and there is no residual impurity inside. Therefore, there are practical effects such as efficient sampling preprocessing operations.

Furthermore, since a pressure-resistant enclosure structure is achieved by fitting the enclosure cap and the gasket receiver, the sample inside the glass tube can be safely and reliably heat-treated.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of an enclosure tube for analysis showing a conventional embodiment, Fig. 2 is a glass enclosure tube showing an embodiment of this invention, Fig. 3 is an overall configuration diagram of this invention, and Fig. 4 is an explanatory diagram of an enclosure tube for analysis showing a conventional embodiment. FIG. 2 is an exploded view of the enclosing device according to this invention. 10... Glass tube for enclosure, 10a... Tip part,
10b... Mouth, 11... Enclosing device, 12... Enclosing cap, 13... On-off valve.

Claims (1)

[Scope of utility model registration request] A sample-sealing glass tube with an elongated tip and a mouth somewhat larger in diameter and thicker than the tip, a gasket in contact with the lower surface of the mouth, and an external tube at the tip of the glass tube. a gasket receiver inserted and prevented from coming off by the gasket; a seal abutting the upper surface of the mouth so as to cover the glass tube mouth; and a seal removably fitted to the gasket receiver from the outside of the seal. An enclosure cap, an on-off valve detachably attached to the enclosure cap, and a pore provided in the seal and the enclosure cap so that the inside and outside of the glass tube communicate with each other when the on-off valve is open. An enclosed tube structure for analysis characterized by: