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Pretreatment method for directly measuring trace cadmium in soil by solid sample introducing atomic fluorescence cadmium analyzer

An atomic fluorescence and solid sampling technology, which is applied in the field of trace pollutant analysis in the environment, can solve the problems of lack of effective pre-treatment methods for determination, and achieve the effects of avoiding sample pollution and element loss, shortening the measurement period, and reducing the sampling volume

Inactive Publication Date: 2015-03-11
AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the solid sample injection atomic fluorescence cadmium analyzer is used for the lack of effective pretreatment methods for the determination of cadmium content in soil, and to provide a solid sample injection atomic fluorescence cadmium analyzer for direct and rapid determination of cadmium in soil. method, providing a new and effective pretreatment method for on-site rapid detection and analysis of trace heavy metal cadmium in soil

Method used

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  • Pretreatment method for directly measuring trace cadmium in soil by solid sample introducing atomic fluorescence cadmium analyzer
  • Pretreatment method for directly measuring trace cadmium in soil by solid sample introducing atomic fluorescence cadmium analyzer
  • Pretreatment method for directly measuring trace cadmium in soil by solid sample introducing atomic fluorescence cadmium analyzer

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Embodiment 1

[0025] Soil reference materials from different regions and with different properties in my country were selected as the analysis objects. The analysis methods and effects are as follows:

[0026] Analysis method: Take 2mg of the national soil standard material to be analyzed respectively, put them in the sample boat, add 20μL of absolute ethanol and 20μL of saturated KMnO 4 The solution was completely immersed in the soil, and the soaked soil was used for the determination of trace cadmium in the soil by using a direct solid sampler coupled with an atomic fluorescence spectrometer.

[0027] The working conditions of the instrument are the same as those described in the previous detailed description.

[0028]

[0029]

Embodiment 2

[0031] Soil sediments from different regions and with different properties in my country were selected as the analysis objects. The analysis methods and effects are as follows:

[0032] Analysis method: Take 8 mg of the national soil standard material to be analyzed respectively, put them in the sample boat, add 20 μL of absolute ethanol and 20 μL of saturated KMnO 4 The solution was completely immersed in the soil, and the soaked soil was used for the determination of trace cadmium in the soil by using a direct solid sampler coupled with an atomic fluorescence spectrometer.

[0033] The working conditions of the instrument are the same as those described in the previous detailed description.

[0034]

[0035] .

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Abstract

The invention provides a pretreatment method for directly measuring trace cadmium in soil by a solid sample introducing atomic fluorescence cadmium analyzer, and belongs to the field of analysis of trace pollutants in the environment. The method comprises the following steps: putting test soil which is ground through a ball mill and filtered by a 100-mesh sieve into a sample boat, adding absolute ethanol and a saturated potassium permanganate solution for soaking, and directly testing trace cadmium in the soil by the solid sample introducing atomic fluorescence cadmium analyzer. According to the method, the detection sampling amount is low; no complicated sample digestion process is required, so that the sample pollution and the element loss can be avoided; the test soil is directly obtained, absolute ethanol and KMnO4 are added into the test soil, the reaction is instantly finished, and the time for the whole one-time test process does not exceed 3 minutes, so that the test cycle is shortened; the method has the characteristics of high accuracy and sensitivity. The invention provides a new effective pretreatment method for quick field detection analysis of trace heavy metal cadmium in the soil.

Description

technical field [0001] The invention belongs to the field of analysis of trace pollutants in the environment, in particular to a pretreatment method for direct determination of trace cadmium in soil by a solid sampling atomic fluorescence cadmium analyzer. Background technique [0002] With the rapid development of industry and agriculture, the problem of cadmium pollution in my country is becoming more and more serious. The cadmium in the soil can be transferred to plants, causing plant poisoning, and further passing through the food chain to pose a threat to animal and human health. Therefore, the rapid detection technology of cadmium has received extensive attention in recent years. At present, the confirmatory detection methods of cadmium in soil are relatively mature, including graphite furnace atomic absorption method, atomic fluorescence method, inductively coupled plasma emission spectrometry and mass spectrometry, etc. However, most of these methods use expensive in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64G01N1/28
Inventor 穆莉黄培鑫刘潇威李军幸赵玉杰戴礼洪徐亚平郑波
Owner AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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