Detection method and detection equipment of inorganic selenium

Abstract

A detection method and detection equipment for inorganic selenium are disclosed. The detection method comprises: respectively adding 50 ml of a reaction solution into a first reaction container (3) and a second reaction container (4), wherein the reaction solution includes 0.001 mol of potassium persulfate , 0.5mg methylene blue, 2g hexamethylenetetramine, 0.05mol concentrated hydrochloric acid and 0.3mg hydroxypropyl β-cyclodextrin, wherein, in the first reaction vessel (3), add 50ml sampling solution, the second reaction vessel ( 4) Add 50ml of distilled water, heat the first and second reaction vessels (3, 4) at 50°C for 5-7 minutes and then cool to room temperature; insert the second reaction vessel (4) into the absorbance detection unit (5) The first absorbance is obtained by measurement, the first reaction container (3) is inserted into the absorbance detection unit (5) to measure and obtain the second absorbance, the second absorbance is compared with the first absorbance to obtain an absorbance difference, and the absorbance difference and the value based on the absorbance difference Inorganic selenium concentration curve is compared to obtain the inorganic selenium concentration of the sample to be tested.

Description

Technical field[0001]The present invention relates to an inorganic selenium detection technology, in particular, a method and a detection device for inorganic selenium.Background technique[0002]Selenium is a trace element necessary for the human body, known as "king of anti-cancer" in the trace element of the human body. Scientifically, the high and low of selenium concentration in blood is related to the incidence of cancer. Since "selenium" has high antioxidant effects, the human body supplementary selenium can prevent organ aging and lesions, delay aging, enhance immunity, resist disease, resistance to poisonous heavy metals. Late selenium is the main cause of Kehan ​​disease and large bone disease. The World Health Organization recommends that 200 μg of selenium is added daily, which can effectively prevent the high hair of various diseases. A large number of survey data description, the high and low selenium content in a region has a direct relationship with the incidence of ca...

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Problems solved by technology

This patent uses a strong alkaline solution (such as sodium hydroxide solution) to extract the inorganic selenium in selenium-enriched yeast. The extraction speed is fast, the time is short, and the measurement time is no more than 1 hour. The application range is small, and the detection time is long and the accuracy is not high, it is easy to be interfered, and the detection stability is poor

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