JPH079111Y2 - Sample tube for nuclear magnetic resonance - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to improvement of a sample tube for a small amount of sample used in a nuclear magnetic resonance apparatus.

[Conventional technology]

In the nuclear magnetic resonance apparatus, for example, since a sample tube A or G for a small amount of sample as shown in FIGS. 4 and 5 is used,
There was no effective means to measure by titrating or degassing.

That is, the sample tube A shown in FIG. 4 accommodates a sample (not shown) in the accommodation chamber At, and at the top of the accommodation chamber At in order to suppress the generation of vortices due to the rotation of the sample tube during measurement. The measurement is performed by inserting the plug B. The plug B is required to be fitted and has a communication hole Ba formed in the central shaft portion as a dissipation port for bubbles generated from the solution sample.

On the other hand, the sample tube G shown in FIG. 5 defines a sample chamber Gb by the partition plate H, and the sample chamber Gb is formed at the center of the partition plate H.
A structure is provided in which a communication hole Ha that connects Gb and the upper chamber Ga is formed.

[Problems to be solved by the device]

When the sample is titrated, in the case of the former sample tube A shown in FIG. 4, it is necessary to take out the plug B, and in the case of the latter sample tube G shown in FIG. Must be taken out of tube G. However, there is a problem that the titration measurement cannot be performed with a small amount of sample because the operation involves mixing and loss of impurities.

In addition, each communication hole Ba, Ha formed in the plug B and the partition plate H
Since there is contact with the sample, there was a problem that not only the magnetic field was disturbed significantly, but deaeration operation and exchange of dissolved gas could not be performed, but since there was no other effective method, it was conventionally overlooked as a necessary evil. .

Therefore, the technical problem of the present invention is that when measuring a small amount of sample,
It is an object of the present invention to provide a sample tube for a trace sample used in a nuclear magnetic resonance apparatus capable of performing titration and degassing operations without impairing the homogeneity of a magnetic field.

[Means for Solving the Problems]

Means taken in the present invention to solve the above technical problems are as follows.

A communication hole that allows the inside of the inner pipe and the inside of the outer pipe, which are configured to be fitted into the outer pipe, to be communicated with each other, be provided at a position other than the bottom surface of the inner pipe.

However, in this case, the outer tube and the inner tube both mean a sample tube which is precisely processed using glass or quartz.

[Action]

 The above means operate as follows.

If one sample is stored in the inner bottom of the outer tube and the inner tube is fitted inside the outer tube, the sample sandwiched between the chambers of the outer tube and the inner tube will not be disturbed by the magnetic field. It is possible to measure by.

If the inner tube inserted into the outer tube is inserted further deeply, the sample will be pushed up to the position of the communication hole, so it is possible to degas through the communication hole and mix the samples in both chambers, while the sample from the upper part of the inner tube By injecting the same solvent as above, the sample adhering to the tube wall can be washed off and collected in the bottom storage chamber,
Allows reduction of dead volume of the sample.

As described above, the technical problems described above can be solved by the above means, and the problems of the conventional technology can be solved.

〔Example〕

Hereinafter, preferred embodiments of the sample tube for a nuclear magnetic resonance apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show an example of a partial cross-sectional front view of the inner pipe 1 used in the present invention and an enlarged cross-sectional view of the main part thereof. A small-diameter tube portion 1a is formed in the middle part on the lower end side of the inner tube 1, and the inside of the lower-side tube portion 1b of the small-diameter tube portion 1a forms a storage chamber 1c for a sample (not shown). Reference numeral 2 denotes a communication hole formed in a portion of the inclined surface of the upper end portion of the small diameter pipe portion 1a connected to the inner pipe 1.

In FIG. 3, reference numeral 3 denotes an outer tube in which the above-mentioned inner tube 1 can be fitted freely, and the inner tube 1 can be fitted closely and slidably. The storage chamber 3a of (1) is formed.

To measure a sample using the two inner and outer tubes 1 and 2 configured as described above, first, the sample is housed in the housing chamber 3a of the outer tube 3. Then, the inner tube 1 may be fitted into the outer tube 3 as shown in FIG. 3 and the position may be determined according to the amount of the sample.

If the fitting of the inner tube 1 is further advanced and the sample in the outer tube 3a is pushed up to the vicinity of the communication hole 2, the sample can be degassed through the communication hole 2. Instead of performing the deaeration operation, when another sample is injected into the communication hole 2 portion of the inner tube 1 and the inner tube 1 is pulled out to the original position, the sample of the inner tube 1 passes through the communication hole 2 and the outer tube 3 due to the pressure difference. The sample inside and outside can be easily mixed because the sample moves to.

If the same solvent as the sample in the outer tube 3 is used and the above-mentioned operation is performed, the sample adhering to the tube wall can be washed away and collected at the inner bottom of the tube, and the dead volume can be reduced. Becomes

In the illustrated embodiment, the communication hole 2 is bored at the position of the inclined surface of the upper end of the small-diameter pipe portion 1a. It can be anywhere.

〔effect〕

Therefore, according to the sample tube for the nuclear magnetic resonance apparatus of the present invention,
Since the communication hole can be provided far away from the bottom surface of the inner tube, the bottom surface of the inner tube that most affects the homogeneity of the magnetic field can be made uniform, so that the homogeneity of the magnetic field is improved. Much more accurate measurement results can be obtained. Further, even in the case of a small amount of sample, it is possible to perform measurement by performing titration and degassing operation, and easily perform washing operation.

[Brief description of drawings]

FIG. 1 is a partial sectional front view of an inner pipe used in the present invention, FIG. 2 is an enlarged sectional view of an essential part thereof, and FIG. 3 is an enlarged view of an essential part of a use example of the present invention. 4 and 5 are sectional views of a conventional example. Reference numeral 1 is an inner tube, 1a is a small-diameter tube portion, 1c is a sample storage chamber, 2 is a communication hole, 3 is an outer tube, and 3a is a sample storage chamber.

Claims (1)

[Scope of utility model registration request] 1. A core characterized in that a communication hole for communicating the inside of the inner pipe and the inside of the outer pipe, which is configured to be fitted inside the outer pipe, is formed in a place other than the bottom surface of the inner pipe. Sample tube for magnetic resonance apparatus.