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A method for simultaneous determination of selenium and cadmium in soil

A soil and solution technology, applied to the simultaneous determination of selenium and cadmium in soil, and the field of determination of selenium and cadmium in soil, can solve the problems of low accuracy and sensitivity, and cannot simultaneously measure selenium and cadmium, so as to improve accuracy and Sensitivity, save reagent cost, reduce the effect of detection signal interference

Active Publication Date: 2021-02-23
INST OF AGRI PROD QUALITY SAFETY & STANDARD JIANGXI ACAD OF AGRI SCI
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  • Application Information

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Problems solved by technology

[0005] Therefore, the technical problem to be solved in the present invention is to overcome the problem that selenium and cadmium cannot be measured simultaneously in the prior art, and ICP-MS has the problem of low accuracy and sensitivity when measuring selenium and cadmium in soil, thereby providing an accurate A method with good performance, high sensitivity and simultaneous determination of selenium and cadmium in soil

Method used

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  • A method for simultaneous determination of selenium and cadmium in soil
  • A method for simultaneous determination of selenium and cadmium in soil
  • A method for simultaneous determination of selenium and cadmium in soil

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Embodiment 1

[0034] The present embodiment provides a method for simultaneous determination of selenium and cadmium in soil, specifically:

[0035] (1) Sample processing

[0036] The collected soil was dried naturally, crushed and passed through a nylon sieve with a pore size of 0.15 mm to obtain the soil samples required for the experiment. Weigh 0.10g of soil sample (take the soil standard sample GBW07403 as an example to verify the accuracy of this method) into a polytetrafluoroethylene digestion tank, add 5.0mL of nitric acid with a mass fraction of 65% and 1.0mL of hydrofluoric acid, cover The inner cover is placed in a graphite digestion apparatus for pre-digestion. The pre-digestion heating program is as follows: from room temperature to 140°C for 15 minutes, and maintain for 30 minutes. After the pre-digestion is completed and cooled, put it into a microwave digestion apparatus for microwave digestion. The heating program of microwave digestion is as follows: from room temperature...

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Abstract

The invention belongs to the technical field of environmental analysis and detection, and discloses a method for simultaneously measuring selenium and cadmium in soil by using a dynamic reaction cell-inductively coupled plasma mass spectrometry, specifically comprising: (1) performing digestion processing on a sample to be tested; (2) Detection of digested solutions by dynamic reaction cell-inductively coupled plasma mass spectrometry. In the present invention, the sample to be tested is processed by digestion, and the dynamic reaction cell-inductively coupled plasma mass spectrometry is used to simultaneously measure selenium and cadmium in the soil. By optimizing the reaction gas flow rate and RPq value of the dynamic reaction cell, the interference is effectively reduced and the detection is improved. Out of the limit, improve the detection accuracy and sensitivity.

Description

technical field [0001] The invention belongs to the technical field of environmental analysis and detection, and relates to a method for determining selenium and cadmium in soil, and more specifically, relates to a method for simultaneously determining selenium and cadmium in soil by using a dynamic reaction cell-inductively coupled plasma mass spectrometry. Background technique [0002] Selenium (Se) is an essential trace element for human life and health. It has multiple biological functions. If the intake is insufficient or the consumption is too much, it will cause various diseases. In addition, selenium also has anti-cancer effects, known as "King of Cancer". In recent years, food supplementation of selenium has ushered in an upsurge. Selenium-enriched products have become the "darling" of my country's food consumption market. Chaoyang health industry has entered the era of "selenium". Problems, especially the safety of selenium-enriched agricultural products have arous...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/62G01N1/44
CPCG01N1/44G01N27/62
Inventor 魏益华张金艳邱素艳涂田华熊艳陈庆隆戴廷灿
Owner INST OF AGRI PROD QUALITY SAFETY & STANDARD JIANGXI ACAD OF AGRI SCI
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