Fast analyzer for nondestructive measuring heavy metal cadmium in foods and analyzing method

Abstract

The invention relates to a fast analyzer for nondestructive measuring heavy metal cadmium in foods and an analyzing method, and belongs to the technical field of food safety detection. The fast analyzer comprises an X-ray fluorescence analysis mechanism, an analyzer case, a specimen cup and an intelligent controlling mechanism. The analyzing method comprises the following steps: specimens are put into the specimen cup, and the specimen cup is put into the detection hole of the analyzer case; the X-ray fluorescence analysis mechanism is adopted to measure; the content of cadmium in the specimens is calculated by the intelligent controlling mechanism; the X-ray fluorescence analysis mechanism is an X-ray fluorescence analysis mechanism with high power energy dispersion; the specimens are powdery or granular specimens without chemical digestion or enrichment pretreatment. According to the invention, the fast analyzer has the following advantage: the pretreatment is not needed to be carried out on food specimens, the purpose that the heavy metal cadmium in the food specimens is detected can be realized; the fast analyzer has the characteristics of non-destruction, directness, rapidness, high sensitivity, convenience for field measurement and the like.

Description

technical field [0001] The invention belongs to the technical field of analysis and detection of heavy metal cadmium in food. The invention provides a fast analyzer and analysis method for nondestructively measuring heavy metal cadmium in food, which can quickly and accurately measure the content of cadmium in food, so as to determine whether the cadmium content exceeds National standard. Background technique [0002] Cadmium, CADMIUM, chemical symbol Cd, melting point 320.9°C, boiling point 765°C, atomic number 48, cadmium is highly toxic and can cause human poisoning, including carcinogenicity, kidney failure, bone pain, etc. Prevention and reduction of cadmium poisoning are of great significance . [0003] Studies have shown that some edible plants and edible fungi have relatively strong absorption and enrichment effects on heavy metals, and rice is the bulk cereal crop that has the strongest absorption of cadmium. Generally, rice with excessive cadmium content is commo...

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Problems solved by technology

[0005] The problems of the above method are: 1) The sample needs complicated pretreatment, which is cumbersome to operate and takes a long time; 2) The analytical instrument is huge and has high requirements for the use environment; 3) The analysis process requires auxiliary equipment such as water and gas and Conditional support; 4) It cannot meet the needs of real-time emergency rapid detection on site

Carbonization and ashing processing increase the complexity and time of detection, and the different processing effects of different samples will affect the measurement results, which is inconvenient to promote and apply in the field of summer grain purchase and granary

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