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Method for determining lead content of red soil in Guizhou province and correcting factor thereof

A technology of correction factor and lead content, which is applied in the preparation of test samples, soil testing, material inspection products, etc., can solve the problems of reducing detection steps and failing to meet application requirements, so as to shorten detection time and meet application requirements Effect

Inactive Publication Date: 2017-05-17
GUIZHOU INST OF SOIL & FERTILIZER
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  • Claims
  • Application Information

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Problems solved by technology

[0013] 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 lead 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 lead elements in the medium 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 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 determining lead content of red soil in Guizhou province and correcting factor thereof
  • Method for determining lead content of red soil in Guizhou province and correcting factor thereof
  • Method for determining lead content of red soil in Guizhou province and correcting factor thereof

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Embodiment 1

[0024] 1. Implementation

[0025] (1) Test soil

[0026] The test soil samples were taken from the soil samples of the “National Survey of Soil Heavy Metal Pollution Prevention and Control of Agricultural Products Producing Areas” in the sample bank of the Soil and Fertilizer Research Institute of Guizhou Academy of Agricultural Sciences. The number of soil samples is 80, the soil type is red soil, and the soil particle size is fine soil through 100 mesh sieve.

[0027] (2) Main reagents and instruments

[0028] ①Main reagents: nitric acid (Germany Merck, analytical grade); hydrochloric acid (Chinese National Medicines, excellent grade pure); perchloric acid (Jinshan Chemical Test, excellent grade pure); hydrofluoric acid (Shanghai Shenbo, excellent grade pure); to Ionized water; ICP-MS standard stock solution (GSB 04-1767-2004, multi-element standard solution, 100μg / mL, National Nonferrous Metals and Electronic Materials Analysis and Testing Center); rhodium (Rh) standard solution (...

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Abstract

The invention discloses a method for determining lead content of red soil in Guizhou province and a correcting factor thereof. The method comprises the following steps of: taking a ratio of a determining value of the lead content in a soil sample acquired on the basis of the flame atomic absorption spectrometry to the determining value acquired on the basis of a 1:1 chloroazotic acid water-bath digestion-ICP-MS preliminary screening method as a correcting coefficient; taking an average value of the correcting coefficients of all the samples as the correcting factor; utilizing the correcting factor to quickly determine the lead content of the red soil in Guizhou province according to the 1:1 chloroazotic acid water-bath digestion-ICP-MS preliminary screening method. Through the method and the correcting factor, the determining time can be greatly shortened. The 1:1 chloroazotic acid water-bath digestion-ICP-MS preliminary screening method is adopted for correcting the determining value of the lead element in the soil, so that the application requirement in the practical work can be met.

Description

Technical field [0001] The invention belongs to the technical field of soil heavy metal detection, and specifically relates to a 1:1 aqua regia water bath digestion-ICP-MS primary screening method for determining the lead content of red soil in Guizhou Province and its correction factor. Background technique [0002] Heavy metal pollution of the soil means that due to human activities, the content of trace metal elements in the soil exceeds the background value, and the content is too high due to excessive deposition. It is collectively called soil heavy metal pollution. Soil heavy metals refer to the phenomenon that due to human activities adding metals to the soil, the heavy metals in the soil are significantly higher than the original content and the quality of the ecological environment deteriorates. [0003] The heavy metals that pollute the soil mainly include mercury (Hg), cadmium (Cd), lead (Pb), chromium (Cr) and metalloid arsenic (As) and other elements with significant b...

Claims

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Application Information

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IPC IPC(8): G01N33/24G01N1/44
CPCG01N33/24G01N1/44
Inventor 秦松周玮范菲菲朱大雁阎献芳
Owner GUIZHOU INST OF SOIL & FERTILIZER
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