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Heating-free digestion method and device for chemical analysis sample

A digestion device and chemical analysis technology, applied in the field of material analysis, can solve problems such as safety accidents, component contamination, and reagent splashing

Pending Publication Date: 2022-07-22
CHINA FIRST HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the need for heating and cooling, it takes a long time and the operation is cumbersome. Heating the acidic solution is also prone to reagent splashing, resulting in component contamination and even safety accidents.

Method used

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  • Heating-free digestion method and device for chemical analysis sample
  • Heating-free digestion method and device for chemical analysis sample
  • Heating-free digestion method and device for chemical analysis sample

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0047] The structure of the heating-free digestion device for chemical analysis samples is as follows figure 2 and image 3 As shown, the constant temperature liquid storage tank 16 includes one low temperature liquid storage tank, one medium temperature liquid storage tank and two high temperature liquid storage tanks, wherein the low temperature liquid storage tank stores distilled water with a temperature of 4° C. Yttrium standard solution (0.1% yttrium nitrate solution) at 20°C, 1+2 nitric acid (1 volume of nitric acid and 2 volumes of pure water) and 1+1 hydrochloric acid at 50°C respectively stored in two high temperature storage tanks (1 volume of hydrochloric acid and 1 volume of pure water are compatible); set the pipetting parameters of each test solution, wherein, 1+2 nitric acid is 20mL, 1+1 hydrochloric acid is 20mL, yttrium standard solution is 10mL, and distilled water is 50mL; The digestion sample is GSB03-1316-201 low-carbon ferromanganese, which was ground ...

experiment example

[0054] Spectral analysis of the sample digestion solution obtained in the examples was carried out by ICP-AES, and the analysis items were silicon and phosphorus.

[0055] The analysis method is as follows: use a standard sample or a reference reagent to compound a standard solution for each mass concentration point of the ICP working curve, select an appropriate analytical line, test the standard solution, and establish a working curve of silicon and phosphorus; The mass fractions of silicon and phosphorus were obtained from the working curve by ICP-AES spectroscopic analysis. The obtained results were compared with the standard sample values, and the results are shown in Table 1:

[0056] Table 1 Comparison table between the analysis results of low carbon ferromanganese and the standard sample value (w%)

[0057]

[0058] As can be seen from Table 1, the error between the analysis result of the low-carbon ferromanganese detected by the embodiment of the present invention...

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Abstract

The invention provides a chemical analysis sample heating-free digestion method and device, and the chemical analysis sample heating-free digestion method comprises the following steps: adding a chemical analysis sample into a container, and adding a composite digestion solution into the container to obtain a sample mixed solution; the sample mixed solution is digested through ultrasonic waves, then volume metering is conducted, and a sample digestion solution is obtained. According to the invention, a sample mixed solution is subjected to high-frequency vibration through ultrasonic waves, so that the collision frequency of a chemical analysis sample and a composite digestion solution is improved, the reaction rate between the chemical analysis sample and the composite digestion solution is accelerated, and meanwhile, the chemical analysis sample can be in full contact with the composite digestion solution, so that the digestion efficiency is improved; besides, the sample digestion solution is digested through ultrasonic waves, the sample digestion solution does not need to be heated, the chemical analysis sample is digested through mechanical energy, digestion of the chemical analysis sample is achieved in a heating-free mode, the problem that consumed time is too long due to temperature rising and cooling is solved, the digestion time is short, and operation is easy.

Description

technical field [0001] The invention relates to the technical field of material analysis, in particular, to a heating-free digestion method and device for chemical analysis samples. Background technique [0002] In the process of chemical analysis of the sample, the digestion of the sample is an important part of the chemical wet analysis. In the prior art, the sample needs to undergo a multi-step chemical reaction to uniformly dissolve and disperse various components to be analyzed in the sample in an acidic solution, and then use it for subsequent analysis and measurement. Among them, some samples can be directly digested by chemical thermal acid in a certain concentration range of dilute acid under heating conditions. The main technical process is: placing the sample in the digestion vessel - adding acid digestion solution - heating digestion - adding Other reagents——Complete the digestion, after digestion, it needs to be further cooled to volume, specifically: natural c...

Claims

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Application Information

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IPC IPC(8): G01N1/44
CPCG01N1/44
Inventor 马雷
Owner CHINA FIRST HEAVY IND
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