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A kind of hydrofluoric acid-resistant sample dissolving device and using method

A hydrofluoric acid-resistant and sample-dissolving technology is applied in the field of hydrofluoric acid-resistant sample-dissolving devices, which can solve the problems of large amount of acid required, fast acid evaporation, difficult processing, etc., and achieves slow acid evaporation and convenient operation. , the effect of reducing costs

Inactive Publication Date: 2017-09-22
CSIC SPECIAL EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned method problem is: 1, acid evaporation speed is fast under normal pressure; 2, the consumption of acid needed to maintain certain reaction time is big, and waste is big; 3, the waste acid of evaporation is directly discharged into atmosphere, and processing is difficult

Method used

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  • A kind of hydrofluoric acid-resistant sample dissolving device and using method
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  • A kind of hydrofluoric acid-resistant sample dissolving device and using method

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Embodiment 1

[0028] A hydrofluoric acid-resistant sample dissolving device and a use method thereof. Such as figure 1 As shown, the sample dissolution device is composed of a check pressure relief valve 1 , an absorption tank 2 and a sample dissolution container 3 . The upper end of the sample dissolution container 3 is embedded with the annular boss at the bottom of the absorption tank 2, the lower end of the check pressure relief valve 1 is placed in the annular groove 10 at the bottom of the absorption tank 2, the center line of the check pressure relief valve 1, the absorption tank The centerline of 2 and the centerline of sample dissolution container 3 are the same straight line.

[0029] Such as figure 1 As shown, the sample dissolving container 3 is a short cylindrical container, and the short cylindrical container refers to a container whose height of the cylinder is smaller than the diameter of the cylinder.

[0030] Such as figure 1 with image 3 As shown, the absorption tan...

Embodiment 2

[0040] A hydrofluoric acid-resistant sample dissolving device and a use method thereof. Except following technical parameter, all the other are with embodiment 1:

[0041] The diameter d of the air hole 9 1 is the vertical valve channel diameter d 2 2.5~3 times of that.

[0042] The gap between the valve body 5 and the valve core 6 is 0.1-1.2 mm.

[0043] The volume of the absorption tank 2 is 5-60mL.

[0044] Add 1-30ml of sample-dissolving acid 12 into the sample-dissolving container 3, cover the absorption tank 2 equipped with a check pressure relief valve 1, and then add 1-30ml of absorption solution 13 into the absorption tank 2.

[0045] The sample-dissolving acid 12 is a mixture of hydrofluoric acid and one or more of the following acids, which are hydrochloric acid, perchloric acid and sulfuric acid.

[0046] The absorption liquid 13 is one of lime water and sodium hydroxide solution.

[0047] Compared with the prior art, this specific embodiment has the followin...

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Abstract

The invention relates to a hydrofluoric acid-resistant sample dissolving device and a using method. The technical solution is: the upper end of the sample dissolution container (3) is embedded with the annular boss at the bottom of the absorption tank (2), and the lower end of the check pressure relief valve (1) is inserted into the annular groove (10) at the bottom of the absorption tank (2). )Inside. The sample-dissolving container (3) is a short cylindrical container; the opening end of the tank body of the absorption tank (2) is connected with the upper plane of the tank bottom of the absorption tank (2) as a whole, and the closed end of the tank body has an installation hole (8), The check pressure relief valve (1) is put into the absorption tank (2) from the installation hole (8), and the center of the tank bottom is provided with a vent hole (9). The spool (6) of the check pressure relief valve (1) is placed concentrically into the valve body (5), and exhaust ports (7) are symmetrically opened on the edge of the valve body (5); the spool (6) ) The upper end surface of the cylinder is provided with a horizontal valve channel along the diameter direction, and the lower end surface of the cylinder is provided with a vertical valve channel upwards along the center line, and the vertical valve channel communicates with the horizontal valve channel. The invention has the characteristics of simple structure, convenient operation, reduced acid consumption, low cost, ability to collect waste acid and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of sample dissolving devices. In particular, it relates to a hydrofluoric acid-resistant sample dissolving device and a use method. Background technique [0002] At present, sample-dissolving acid containing hydrofluoric acid is widely used to dissolve and process samples containing silicon dioxide, elemental silicon and silicates, and the dissolved samples are used for chemical composition determination. Typical applications include the analysis method of silicon carbide in common abrasives (GB / T3045-2003), the determination of silicon carbide in corundum (YB / T175-2000), etc. The traditional acid-dissolving sample container is an open container or a container with a one-way exhaust sealing cover (such as a cover funnel). The acid dissolution process generally needs to maintain a certain acidity and time. During the heating and acid dissolution process, a large amount of acid evaporates, which not only red...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/44
Inventor 徐汝钦
Owner CSIC SPECIAL EQUIP CO LTD