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Method for measuring total sulfur in soil or water-based sediments

A technology for water system sediments and soils, which is applied in the preparation of test samples, thermal excitation analysis, material excitation analysis, etc. It can solve the problem of difficulty in determining total sulfur and improve work efficiency.

Inactive Publication Date: 2020-02-07
中化地质矿山总局地质研究院
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the problem in the prior art that it is difficult to measure low-level total sulfur in soil and water system sediments, the present invention provides a method for determining total sulfur in soil and water system sediments

Method used

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  • Method for measuring total sulfur in soil or water-based sediments
  • Method for measuring total sulfur in soil or water-based sediments
  • Method for measuring total sulfur in soil or water-based sediments

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Embodiment 1

[0025] 1.1 Instrument and working parameters

[0026] ICAP 6300 Inductively Coupled Plasma Emission Spectroscopy (Thermo Electric Corporation). The working conditions of the instrument are shown in Table 1.

[0027] Table 1 Inductively Coupled Plasma Optical Emission Spectroscopy Instrument Conditions

[0028]

[0029] 1.2 Standard solution and main reagents

[0030] Sulfur standard solution: national standard solution (GSB G6210-90), the concentration is 1000ug / ml medium water. (National Steel Materials Testing Center Iron and Steel Research Institute)

[0031] Sulfur standard stock solution: divide 25ml of sulfur standard solution into a 250ml volumetric flask, add 25ml of hydrochloric acid to be configured as a standard stock solution (acidity 10%) with a sulfur concentration of 100ug / ml.

[0032] Hydrochloric acid, nitric acid, hydrofluoric acid, perchloric acid. (Tianjin Kemiou, premium grade, 3000ml)

[0033] Inverse aqua regia: It is prepared by mixing nitric a...

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Abstract

The invention relates to a method for measuring total sulfur in soil or water-based sediments, and the method uses a mixed acid solution sample of reverse aqua regia and perchloric acid, and uses ICPemission spectrometry to measure the sulfur content in the solution after dissolving salts by adding hydrochloric acid. The method provided by the invention can quickly and accurately determine the total sulfur content in a geochemical sample, and solves the problems of low content, poor accuracy, low precision, long time consumption for testing samples and low work efficiency of the combustion iodometry.

Description

technical field [0001] The invention relates to the technical field of soil and water system sediment detection, in particular to a method for measuring total sulfur in soil or water system sediment. Background technique [0002] At present, the method for determining the total sulfur in soil and water system sediments in the rock and mineral analysis laboratory adopts the Sinochem People's Republic of China Geological and Mineral Industry Standard "Regional Geochemical Sample Analysis Method Part 28: Combustion Iodine Method" (DZ / T0279. 28—2016). However, since the titration end point of this method is compared with the chromaticity of the blank sample, the end point is difficult to judge, especially for low-content samples, and the titration end point is difficult to control, resulting in poor accuracy and low precision of the test results. Contents of the invention [0003] Aiming at the problem in the prior art that it is difficult to measure low-content total sulfur ...

Claims

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Application Information

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IPC IPC(8): G01N21/73G01N1/28
CPCG01N1/28G01N21/73
Inventor 王洋张露露李津
Owner 中化地质矿山总局地质研究院