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Method for determining lead content of limestone soil in Guizhou province and correction factor thereof

A technology of correction factor and lead content, which is applied in the direction of measuring devices, preparation of test samples, color/spectral characteristic measurement, etc., can solve the problems of reducing detection steps and unsatisfactory, shortening detection time and meeting application requirements

Inactive Publication Date: 2017-05-24
GUIZHOU INST OF SOIL & FERTILIZER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The purpose of this invention is to provide a kind of method and correction factor thereof of 1: 1 aqua regia water bath digestion-ICP-MS primary sieve method determination lime soil lead content in Guizhou province, to overcome existing aqua regia digestion method can not meet the requirement in actual work The problem of the application requirements of the primary screening of lead elements in soil is to meet the primary screening of large quantities of soil lead content in actual work, so as to reduce the use of reagents, reduce detection steps, reduce detection time, improve work efficiency, and shorten environmental accidents Purpose of Emergency Response Time

Method used

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  • Method for determining lead content of limestone soil in Guizhou province and correction factor thereof
  • Method for determining lead content of limestone soil in Guizhou province and correction factor thereof
  • Method for determining lead content of limestone soil in Guizhou province and correction factor thereof

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Embodiment 1

[0024] 1. Implementation method

[0025] (1) Test soil

[0026] 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 80, the soil type is lime soil, and the soil particle size is fine soil passing through a 100-mesh sieve.

[0027] (2) Main reagents and instruments

[0028] 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 (...

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Abstract

The invention discloses a method for determining the lead content of limestone soil in Guizhou province and a correction factor thereof. The method comprises the following steps: taking a ratio of a determined value based on flame atom absorption spectrometry to a determined value based on 1:1 aqua regia water bath counteraction-ICP-MS (Inductively Coupled Plasma Mass Spectrometry) primary screening of the lead element content of a soil sample as a correction coefficient; taking the average value of correction coefficients of all samples as the correction factor; and quickly determining the lead content of limestone soil in Guizhou province based on the correction factor through 1:1 aqua regia water bath counteraction-ICP-MS primary screening. According to the method and the correction factor, the detection time can be greatly shortened, and the soil lead element detection value based on 1:1 aqua regia water bath counteraction-ICP-MS primary screening can be corrected, thereby satisfying the application requirements 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 lead content of lime 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) and...

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
CPCG01N21/73G01N1/28G01N1/38G01N1/44G01N21/3103
Inventor 朱大雁周玮范菲菲秦松阎献芳
Owner GUIZHOU INST OF SOIL & FERTILIZER
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