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Method for measuring chromium content of red soil in Guizhou province and correction factor thereof

A technology of correction factor and chromium content, which is used in measurement devices, preparation of test samples, and measurement of color/spectral properties, etc., can solve the problems of reducing detection steps, unable to meet application requirements, etc., so as to shorten detection time and meet application requirements. Effect

Inactive Publication Date: 2017-08-18
GUIZHOU INST OF SOIL & FERTILIZER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The purpose of this invention is to provide a kind of 1:1 aqua regia water bath digestion-ICP-MS primary screening method to measure the method and correction factor thereof of red soil chromium content in Guizhou Province, to overcome existing aqua regia digestion method can not meet the requirement of soil in actual work The problem of the application requirements of the primary screening of chromium element is to meet the primary screening of large quantities of soil chromium content in actual work, so as to reduce the use of reagents, reduce the detection steps, reduce the detection time, improve work efficiency, and shorten the emergency response to environmental accidents purpose of reaction time

Method used

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  • Method for measuring chromium content of red soil in Guizhou province and correction factor thereof
  • Method for measuring chromium content of red soil in Guizhou province and correction factor thereof
  • Method for measuring chromium content of red soil in Guizhou province and correction factor thereof

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Embodiment 1

[0023] 1. Implementation method

[0024] (1) Test soil

[0025] The soil samples for the test were taken from the soil samples of the project "National General Survey on the Prevention and Control of Heavy Metal Pollution in Soil of Agricultural Products Production Areas" in the sample library of the Institute of Soil and Fertilizer, Guizhou Academy of Agricultural Sciences. The number of soil samples is 75, the soil type is red soil, and the soil particle size is fine soil with a 100-mesh sieve.

[0026] (2) Main reagents and instruments

[0027] ① Main reagents: nitric acid (Merck, Germany, analytically pure); hydrochloric acid (Sinopharm, superior grade); perchloric acid (Jinshan Chemical Test, superior grade); hydrofluoric acid (Shanghai Shenbo, superior grade); Ionized water; ICP-MS standard stock solution (GSB 04-1767-2004, multi-element standard solution, 100 μg / mL, National Nonferrous Metals and Electronic Materials Analysis and Testing Center); rhodium (Rh) standard...

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Abstract

The invention discloses a method for measuring chromium content of red soil in Guizhou province and a correction factor thereof. The method comprises the following steps: taking ratio values of measured values according to a flame atomic absorption spectrometry for chromium content of soil samples to the measured value according to a 1:1 aqua regia water-bath digestion-ICP-MS preliminary screening method as correction coefficients; taking an average value of the correction confidents of all the samples as the correction factor; utilizing the correction factor to quickly measure the chromium content of red soil in Guizhou province according to the 1:1 aqua regia water-bath digestion-ICP-MS preliminary screening method. According to the method and the correction factor, the detection time can be greatly shortened and the measured value for the chromium content of red soil according to the 1:1 aqua regia water-bath digestion-ICP-MS preliminary screening method is corrected so as to meet the application requirement in practical work.

Description

technical field [0001] The invention belongs to the technical field of soil heavy metal detection, and in particular relates to a 1:1 aqua regia water bath digestion-ICP-MS primary screening method for determining the chromium content of red soil in Guizhou Province and a correction factor thereof. Background technique [0002] Heavy metal pollution of the soil refers to human activities, the content of trace metal elements in the soil exceeds the background value, and the excessive content caused by excessive deposition is collectively referred to as soil heavy metal pollution. Soil heavy metals refer to the phenomenon that human activities add metals to the soil, causing the heavy metals in the soil to be significantly higher than the original content, and resulting in the deterioration of the quality of the ecological environment. [0003] The heavy metals that pollute the soil mainly include mercury (Hg), cadmium (Cd), lead (Pb), chromium (Cr) and metalloid arsenic (As) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N21/31G01N1/28G01N1/38G01N1/44
CPCG01N1/28G01N1/38G01N1/44G01N21/3103G01N21/73
Inventor 秦松周玮范菲菲朱大雁阎献芳
Owner GUIZHOU INST OF SOIL & FERTILIZER
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