JPS6218270Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for uniformly dispersing and mixing two or more types of powder with high precision.

When performing non-destructive quantitative analysis of powder samples,
Generally, X-ray analysis methods are used. In quantitative analysis using X-ray analysis, the internal standard method is commonly used because it can eliminate equipment fluctuations, matrix effects, and the like.

The internal standard method involves mixing a certain amount of a known substance into a test sample, measuring the intensity of the spectrum of the known substance and the spectrum of the test sample, and using the ratio to create a calibration curve. be. Therefore, when using the internal standard method, it is necessary to uniformly mix the test sample and the known substance.

2 with enough precision to be used for quantitative analysis.
Methods for uniformly mixing powders of seeds or higher are as follows: 1. Mix carefully in a mortar.

2. Mix carefully with an organic solvent in a mortar and remove the organic solvent.

3) Pour into a container and shake the whole container to mix; 4) Put it into a container with an organic solvent, shake the whole container to mix, and then remove the organic solvent.

When two or more types of powder are uniformly mixed as a sample preparation method for quantitative analysis, the uniformity directly affects the precision and accuracy of quantitative values. Therefore, in order to obtain accurate and highly accurate quantitative values, it is necessary to prepare a sample with high uniformity. However, the method using a mortar or shaker described above has the following disadvantages: 1. The uniformity of the prepared sample (including known substances) is insufficient; 2. The preparation requires too much effort.

Conventional powder mixing methods used a mortar and shaker, which did not provide sufficient uniformity, but the present inventor focused on ultrasonic waves, which have high dispersion and mixing power. However, it has been found that simply applying a general ultrasonic cleaner is insufficient in the following points.

In other words, even if the powder and solvent are placed in an ultrasonic cleaner and mixed uniformly, it is necessary to remove the solvent. Since it settles and accumulates, even efforts to mix it uniformly are wasted.

Since this invention combines an ultrasonic vibrator and a heating means, even after uniform mixing, the solvent is gradually blown away by heating while applying ultrasonic waves. There is no need to worry about it settling out and becoming uneven.

That is, the powder mixing device of the present invention includes a mixing tank containing two or more types of powder and a solvent, an ultrasonic vibrator disposed so as to be in contact with the bottom plate of the mixing tank, and a powder mixing tank containing two or more types of powder and a solvent. Since it consists of a means for heating the powder and the solvent, it is possible to mix the powder extremely uniformly.

The present invention will now be described with reference to an embodiment of the apparatus shown in FIG.

In the figure, reference numeral 1 denotes a mixing tank, which consists of a side wall 1b and a bottom plate 1a, and the upper part is open to the atmosphere.

The ultrasonic transducer 2 connected to the high frequency power source 2 is
It is in contact with the lower surface of the bottom plate 1a and vibrates.

Reference numeral 5 denotes a heater attached to the outer periphery of the side wall 1b of the mixing tank 1, which is connected to the power source 4, and is used to heat the powders 7 and 8 stored in the mixing tank 1 and the mixing solvent 6.
It is used to heat.

Now, the powder 7 is a test sample and the powder 8 is a known substance, and the powders 7 and 8 and the solvent 6 are placed in the mixing tank 1 to uniformly mix them.

The high frequency power source 2 is turned on, the ultrasonic vibrator 2 is vibrated, the bottom plate 1a is shaken, and the powders 7 and 8 are dispersed and mixed in the solvent 6.

After confirming that the powders 7 and 8 are sufficiently mixed in the solvent 6, turn on the power 4 of the heater 5 and turn on the mixing tank 1.
is heated to volatilize the solvent 6.

After the solvent 6 has completely volatilized, the ultrasonic vibrator 3
Then, the power sources 2 and 4 of the heater 5 are turned off, and the mixed powder is taken out.

As described above, by using the powder mixing apparatus according to one embodiment of the present invention, the following effects can be expected compared to the conventional method.

(1) As a means of mixing the powders 7 and 8, an ultrasonic vibrator 3 with high dispersion and mixing effects is installed on the bottom plate 1a of the mixing tank 1.
Since the mixture is brought into contact with the mixing means, it can be said that the uniformity is much better than that of conventional mixing means.

(2) Since dispersion mixing is possible under certain conditions,
It is possible to set certain preparation conditions using factors such as mixing time.

(3) Since the heater 5 is attached to the side wall 1b of the mixing tank 1, heating can be performed while mixing with the ultrasonic vibrator 3, and the solvent 6 can be evaporated without the powders 7 and 8 settling or separating. becomes possible.

(4) Since all processes from dispersing and mixing the powder to volatilizing the solvent are carried out in the same mixing tank, the operator must put the solvent and powder into the mixing tank, turn on the power switch, and turn on the power.
All you have to do is turn it off, making it very easy to operate.

[Brief explanation of the drawing]

FIG. 1 is a diagram of an apparatus showing an embodiment of the present invention. 1: Mixing tank, 1a: Bottom plate, 1b: Side wall, 3: Ultrasonic vibrator, 5: Heater, 6: Solvent, 7 and 8: Powder.

Claims (1)

[Scope of utility model registration request] It consists of a mixing tank containing two or more types of powder and a solvent, an ultrasonic vibrator arranged so as to be in contact with the bottom plate of the mixing tank, and a means for heating the powder and solvent in the mixing tank. A powder mixing device characterized by: