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Method for quickly and efficiently detecting content of trace elements in quartz sand through microwave digestion

A technology of microwave digestion for medium and trace elements, which is applied in the preparation of test samples, color/spectral characteristic measurement, etc., and can solve problems such as environmental pollution, expensive testing instruments, and complicated operation processes

Active Publication Date: 2012-07-18
安徽省石英砂及制品质量监督检验中心 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The detection method used in China has a complicated operation process. At the same time, the amount of toxic and harmful chemical reagents used in the digestion process is large, which will inevitably cause environmental pollution. If the ventilation conditions are not good, it may even cause physical damage to the testing personnel.
[0004] Although there are also new detection methods in China, for example, the analysis of common metal elements such as iron, aluminum, calcium, magnesium, potassium and sodium in quartz sand determined by Zhang Guo et al. method, but the detection instruments used in this method are expensive and cannot be effectively promoted

Method used

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  • Method for quickly and efficiently detecting content of trace elements in quartz sand through microwave digestion
  • Method for quickly and efficiently detecting content of trace elements in quartz sand through microwave digestion
  • Method for quickly and efficiently detecting content of trace elements in quartz sand through microwave digestion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Accurately weigh about 0.3g of quartz sand into the sample-dissolving cup of the microwave digestion tank, add 1.5g of HF and 0.07g of nitric acid solution, use a flarer to expand the lid of the sample-dissolving cup and slowly cover the sample-dissolving cup vertically Keep the cup tightly sealed.

[0018] Put the sample dissolving cup into the digestion tank, cover the digestion tank, put it into the microwave digestion instrument, set the digestion time, preset pressure and other microwave digestion conditions according to the operation requirements, as shown in the table below,

[0019] Work step

Preset pressure (MPa)

running time (min)

Real-time pressure (MPa)

1

0.2

3

0.2

2

0.4

3

0.4

3

0.6

3

0.6

4

0.8

3

0.8

5

1.0

3

1.0

6

1.2

3

1.2

7

1.5

3

1.5

[0020] Start t...

Embodiment 2

[0023] Accurately weigh about 0.3g of quartz sand and put it into the sample dissolving cup of the microwave digestion tank, add 6g of HF and 0.2g of nitric acid solution, and the others are the same as in Example 1.

Embodiment 3

[0025] Accurately weigh about 0.3g of quartz sand and put it into the sample dissolving cup of the microwave digestion tank, add 3g HF and 0.12g nitric acid solution, and the others are the same as in Example 1.

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Abstract

The invention discloses a method for detecting the content of trace elements in quartz sand, and particularly relates to a method for quickly and efficiently detecting the content of trace elements in quartz sand through microwave digestion. The method comprises the steps of quartz sand digestion and trace element content determination, wherein quartz sand digestion is carried out in microwave condition, the digestion pressure is controlled at 8-15 atmospheric pressure, and the mass ratio of quartz sand to quartz sand is controlled at 0.05-0.2:1. An experiment is designed according to rich local quartz sand resources in Fengyang, and quartz sand is digested by using the microwave digestion method so as to save time and protect environment. Meanwhile, quantitative determination is carried out by using the o-phenanthroline spectrophotometry so as to achieve the purposes of economy and practicability.

Description

technical field [0001] The invention discloses a method for detecting the content of trace elements in quartz sand, in particular to a method for rapidly and efficiently detecting the content of trace elements in quartz sand by microwave digestion. Background technique [0002] The content of trace elements (such as iron) in quartz sand directly affects the utilization rate and added value of quartz sand, so it is necessary to establish a simple, fast and accurate detection method. [0003] Although there are many methods for detecting iron content in production at present, there are many problems. The detection method used in China has a complex operation process. At the same time, the amount of toxic and harmful chemical reagents used in the digestion process is large, which will inevitably cause environmental pollution. If the ventilation conditions are not good, it may even cause physical damage to the testing personnel. [0004] Although there are also new detection me...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N1/44
Inventor 张雪梅汪徐春张强程年寿
Owner 安徽省石英砂及制品质量监督检验中心
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