Method for analyzing cadmium element pollution in rice seeds

A technology for rice grain and element pollution, which is applied in the fields of analyzing materials, material analysis by electromagnetic means, and measuring devices, which can solve the problems of no method for analyzing the source of Cd pollution in rice grains, complicated Cd isotope determination, and deviation of Cd isotope traceability results. , to achieve the effect of good traceability

Active Publication Date: 2018-03-20
INST OF AGRO FOOD SCI & TECH CHINESE ACADEMY OF AGRI SCI
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Problems solved by technology

[0006] However, because the determination of Cd isotope in rice grains is relatively complicated, and there is a fractionation effect between the Cd isotope in rice grains and the Cd isotope in soil, that is, due to the selective absorption of rice, the Cd isotope in soil and the isotope in rice...

Method used

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  • Method for analyzing cadmium element pollution in rice seeds
  • Method for analyzing cadmium element pollution in rice seeds
  • Method for analyzing cadmium element pollution in rice seeds

Examples

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Embodiment 1

[0048] There are two possible sources of cadmium pollution in a rice planting area, namely a smelter A and a battery production plant B. Plant A, plant B and rice grains were collected respectively, and the cadmium isotope characteristics were determined.

[0049] get δ 114 / 110 Cd A厂 =0.52

[0050] δ 114 / 110 Cd B厂 =-0.13

[0051] δ 114 / 110 Cd 稻米 =0.34

[0052] Into the formula

[0053] The results are: the contribution rate of smelter A to the source of cadmium in rice grain is about 72.38%, and the contribution rate of battery production plant is about 27.62%.

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Abstract

The invention discloses a method for analyzing cadmium element pollution in rice seeds. The method comprises the following steps: I, testing Cd isotope ratios deltaA, deltaB and deltat of a pollutionsource A and a pollution source B in soil and rice seeds respectively; II, calculating a contribution rate fA of the pollution source A to the cadmium element in the rice seeds according to a source analysis equation (1) as shown in the specification, wherein in the equation, deltat is a cadmium element isotope ratio in rice seeds to be analyzed; alpha is a cadmium element isotope fractionation coefficient in soil to rice seeds; deltaA is the cadmium element isotope ratio in the pollution source A; deltaB is the cadmium element isotope ratio of the pollution source B; and the rice seeds to beanalyzed are harvested from the soil. By adopting the method, isotope ratios in different pollution sources and rice seeds are introduced into equations, and together with correction of the fractionation coefficient alpha, quantitative analysis on the source of cadmium pollution in the rice seeds can be precisely implemented, and the contribution rates of different pollution sources to cadmium inrice seeds can be confirmed.

Description

technical field [0001] The invention belongs to the technical field of food safety and relates to a method for analyzing the source of cadmium element pollution in rice grains. Background technique [0002] With the development of industrial mining industry, my country's environment, especially heavy metal pollution in cultivated soil, is gradually exposed. According to the survey results of the Ministry of Environmental Protection and the Ministry of Land and Resources, the rate of cadmium (Cd) in my country's soil exceeds the standard by about 7%, of which heavy cadmium The proportion of pollution points is 0.5%. Cadmium content in about 10%-20% rice grains (ie rice) exceeds the standard. Analyzing the sources of cadmium pollution in rice grains is a prerequisite for controlling cadmium pollution in rice. [0003] There are 8 isotopes of Cd element in the environment, which are 106 Cd, 108 Cd, 110 Cd, 111 Cd, 112 Cd, 113 Cd, 114 Cd and 116 Cd, because the cadmium ...

Claims

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Application Information

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IPC IPC(8): G01N27/64
CPCG01N27/64
Inventor 魏帅郭波莉孙倩倩魏益民
Owner INST OF AGRO FOOD SCI & TECH CHINESE ACADEMY OF AGRI SCI
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