Direct-injection analysis method for quick determination of cadmium content in dairy product

A technology of rapid determination and analysis method, applied in the direction of material analysis, measurement device, analysis material, etc. by optical means, it can solve the problems of pollution, complicated steps, low analysis speed, analysis accuracy and work efficiency, etc. steps, ensure accuracy, improve analysis speed and work efficiency

Active Publication Date: 2017-01-04
浙江华才检测技术有限公司
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide an analysis method for direct sampling and rapid determination of cadmium content in dairy products, which aims to

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[0027] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail through embodiments below. However, it should be understood that the specific embodiments described here are only used to explain the present invention, and are not used to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0028] The embodiment of the present invention provides an analysis method for rapid determination of cadmium content in dairy products by direct sample injection, which includes the following steps:

[0029] Step 1. Sample dilution: Accurately weigh a certain amount of dairy product samples and place them in a beaker, without other pre-treatment, directly pre-dissolve them with a small amount of diluent, transfer to a volumetric

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Abstract

The invention discloses a direct-injection analysis method for quick determination of cadmium content in dairy product. The method comprises the steps of diluting a certain amount of dairy product sample with ultra pure water to form a dilution with a certain dilution factor and directly injecting the dilution, utilizing the graphite furnace atomic absorption spectrometry to determine the cadmium content to quickly determine the cadmium content in the sample. Reducing the possibility of matrix interference to the minimum by using the palladium nitrate as the matrix modifier and combining it with the standard addition method.There is a good linear relationship between the absorbance and concentration of cadmium, with a coefficient of correlation r>=0.9990. The limit of detection (LOD) of the method is 0.8Mug/kg. The direct-injection analysis method for quick determination of cadmium content in dairy product of this invention reduces the steps of sample preparation, accelerating the analysis and improving the working efficiency, meanwhile guaranteeing the accuracy of analysis results to achieve the goal of fast and accurate analysis, which is environmentally friendly and is used as a regular monitoring technology for fast determination of cadmium content in dairy product.

Description

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Claims

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Application Information

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Owner 浙江华才检测技术有限公司
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