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Improved hydrofluoric acid dissolving method for measuring volcano glass content in soil

A hydrofluoric acid and volcanic technology, applied in the field of hydrofluoric acid dissolution to determine the content of volcanic glass in soil, can solve the problem of less samples, single type of parent material, no consideration of different development degrees of soil, soil sample particle size and dissolution time of glass content Determination of the impact of accurate inspection of the impact and other issues to achieve the effect of improving accuracy and simplifying the process

Inactive Publication Date: 2020-12-01
SHENYANG AGRI UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the "Chinese Soil System Classification Retrieval (Third Edition)" published in 2001 determined the identification standard of volcanic ash soil, it did not specify the method for determining the content of volcanic glass involved in the standard, making it difficult to apply the identification standard
[0004] However, D.J. Lowe's research only tested 6 soil samples with rhyolite parent material development. As a method study, the samples were relatively small and the parent material type was single. Moreover, different development degrees of soil and soil sample particle sizes were not considered in his research. , the influence of dissolution time on the determination of glass content and the influence of soil sample particle size on the accurate inspection of polarized light microscope after dissolution

Method used

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  • Improved hydrofluoric acid dissolving method for measuring volcano glass content in soil
  • Improved hydrofluoric acid dissolving method for measuring volcano glass content in soil
  • Improved hydrofluoric acid dissolving method for measuring volcano glass content in soil

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Embodiment 1

[0049] Experimental design for determination of volcanic glass content:

[0050] Soil samples for testing: Soil samples collected from Changbai Mountain Tianchi, Longgang Jinlongdingzi, and Kuandian Huangyi Mountain. The soil-forming time of the Changbai Mountain Tianchi soil is 1200 years, the soil-forming time of the Longgang Jinlongdingzi soil is 1500-1600 years, and the soil-forming time of the Kuandian Huangyi Mountain soil is 120,000 years.

[0051] Pretreatment of soil samples: The soil samples to be tested were passed through a 2mm sieve after being air-dried. Use the wet sieving method to remove fine soil with a particle size of <0.02mm to obtain soil components with a particle size of 0.02-2mm; then pass through a 1mm or 0.5mm sieve by crushing to obtain soils with a particle size of 0.02-1mm and 0.02-0.5mm, respectively sample.

[0052] Accurately weigh 1.0 g of the above-mentioned soil samples with different particle sizes in a plastic (polytetrafluoroethylene ma...

Embodiment 2

[0058] Improved Hydrofluoric Acid Dissolution Method for Determination of Volcanic Glass Content in Soil:

[0059] Soil for test: Soil samples collected at an altitude of 305m from Huangyi Mountain in Kuandian. The soil formation time of Huangyi Mountain in Kuandian is 120,000 years. , 73~93cm and 93~120cm.

[0060] (1) Pre-treatment of soil samples: After the test soil samples are air-dried, pass through a 2mm sieve, and then use a wet sieve method to remove the fine soil with a particle size of <0.02mm to obtain a soil component sample with a particle size of 0.02-2mm; use a dry sieve method to separate Soil samples with a particle size of 0.5 to 2 mm, and the crushing method is used to make this part of the sample pass through a 0.5 mm aperture sieve, and mix evenly with the soil component samples of 0.02 to 0.5 mm.

[0061] (2) Determination of volcanic glass content: Accurately weigh 1.0g soil sample in a plastic (polytetrafluoroethylene material) beaker, add 50mL of con...

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Abstract

The invention relates to the field of soil classification, and discloses an improved hydrofluoric acid dissolving method for measuring volcanic glass content in soil. The method comprises the step ofcrushing particles with larger particle sizes in soil to be tested by using a glass sheet before measurement to enable the particle sizes of all soil samples to be measured to be 0.02 to 0.5 mm. According to the method disclosed by the invention, the glass coated in the middle of the soil particles can be dissolved by hydrofluoric acid, so that the volcano glass determination precision is improved, and the soil can be correctly classified.

Description

technical field [0001] The invention relates to the field of soil classification, in particular to an improved hydrofluoric acid dissolution method for measuring the content of volcanic glass in soil. Background technique [0002] Soil classification is a symbol of the development level of soil science, the basis of soil survey and mapping, one of the basis for promoting agricultural technology according to local conditions, and the medium of soil science information exchange at home and abroad. With the advancement of soil science, soil classification is also developing rapidly. Although the "Chinese Soil System Classification Retrieval (Third Edition)" published in 2001 determined the identification standard of volcanic ash soil, it did not specify the determination method of the volcanic glass content involved in the standard, making it difficult to apply the identification standard. [0003] Volcanic glass is an important component of volcanic ash soil. Volcanic ash so...

Claims

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Application Information

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IPC IPC(8): G01N5/04G01N1/28
CPCG01N5/04G01N1/286
Inventor 韩春兰杨武成
Owner SHENYANG AGRI UNIV