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Solid oxidability testing device, testing method and sampler thereof

A sampler and oxidation technology, applied in the field of chemical hazard detection, can solve the problems of low accuracy and reproducibility of solid oxidation test results, low efficiency of solid oxidation test, etc.

Active Publication Date: 2021-07-06
应急管理部化学品登记中心 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the purposes of the present invention is to provide a solid oxidation test device, test method and sampler thereof, thereby improving the problem of low accuracy and reproducibility of solid oxidation test results in the prior art
[0006] Another object of the present invention is to provide a solid oxidation testing device, testing method and sampler thereof, thereby improving the low efficiency of solid oxidation testing in the prior art

Method used

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  • Solid oxidability testing device, testing method and sampler thereof
  • Solid oxidability testing device, testing method and sampler thereof
  • Solid oxidability testing device, testing method and sampler thereof

Examples

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Embodiment 1

[0053] The oxidizability of the sodium nitrate particles is tested by using the solid oxidizability test device of the present invention, and the reference substance is potassium bromate. The device of this embodiment is placed in a ventilated area, and the test is carried out under atmospheric pressure and an ambient temperature of 20°C±5°C. refer to Figure 1~4 shown. The generatrix of the conical container of the sampler 20 is 70mm long, and the cone angle is 60°.

[0054] (1) Prepare the reference substance potassium bromate (nominal particle size 0.15-0.30mm), dry it to a constant weight (at least 12 hours) at 65°C, and then put it in a desiccator (with desiccant) until it cools down before use. Prepare the cellulose and dry it at 105°C to a constant weight (at least 4 hours), and then put it in a desiccator (with a desiccant) until it cools down before use, ensuring that the moisture content should be less than 0.5% by dry weight.

[0055] (2) Take potassium bromate a...

Embodiment 2

[0070] In this embodiment, the solid oxidizing property test device of the present invention is used to test the oxidizing property of sodium nitrite particles, and the reference substance is potassium bromate. The test procedure is the same as in Example 1.

[0071] The test results show that the sodium nitrite particles measured in this embodiment are "oxidizing solids, category 2". The entire test process of this embodiment takes 50 minutes, and the test results are the same as the example classification of the oxidative test results of solid oxidizing sodium nitrite particles in the "Test and Standard Manual", and the standard deviation of each group of tests is less than 5, and the test accuracy is high , good repeatability.

Embodiment 3

[0073] In this embodiment, the oxidizability of calcium nitrate tetrahydrate (granular) is tested by using the solid oxidizing test device of the present invention, and the reference substance is potassium bromate. The test procedure is the same as in Example 1.

[0074] The test results show that the calcium nitrate tetrahydrate measured in this embodiment is "oxidizing solid, category 3". The whole test process of this embodiment takes 60 minutes, and the test result is the same as the "Test and Standard Manual" solid oxidizable calcium nitrate (water of crystallization) oxidation test result example classification, and the standard deviation of each group of tests is all less than 6, and the test is accurate High accuracy and good repeatability.

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Abstract

The present invention discloses a sampler, comprising: a conical container comprising a first half cone and a second half cone, the first half cone and the second half cone being capable of rotating relative to each other around a rotation axis to switch between a contracted state and an expanded state of the conical container; and two semicircular bottom surfaces which are rotatably connected to the bottom edges of the first half cone and the second half cone respectively, wherein the shapes of the two semicircular bottom surfaces are matched with the shape of the bottom surface of the conical container. The invention further discloses a solid oxidizability testing device and a solid oxidizability testing method. Through the structural design of the sampler, the sampling looseness is consistent, so that the sampling repeatability is ensured, and the accuracy and reproducibility of a solid oxidizability test result are further improved. Automatic control is adopted, the efficiency is higher, and the experiment accuracy is more ideal.

Description

technical field [0001] The invention relates to the field of chemical hazard detection, in particular to a solid oxidation test device, a test method and a sampler thereof. Background technique [0002] In recent years, my country has implemented the Globally Harmonized Chemical Classification System (GHS) and issued a series of standards, including 16 types of physical hazards, 10 types of health hazards and 2 types of environmental hazards. Solid oxidizability, as a type of physical hazard, is used to assess the potential of a solid substance to increase the burning rate or burning intensity of a combustible substance when it is thoroughly mixed with the combustible substance. The test principle of solid oxidizability is: mix the substance to be tested with cellulose in a weight ratio of 4:1 or 1:1, test the burning time of the mixture, and compare it with the reference substance and cellulose 3:7, 2:3 and Burn times of 3:2 mixtures were compared. A sample is in Oxidizin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/12G01N1/38G01N1/04
CPCG01N31/12G01N1/38G01N1/04
Inventor 张金梅王亚琴厉鹏高月吴保意
Owner 应急管理部化学品登记中心
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