On the detection of edible vegetable oil, the acid value and peroxide value we should always clear and understanding, so, how to prepare for the detection of this value before?
Evaluation of edible vegetable oil is in accordance with the national health standards, physical and chemical indicators commonly used is the acid value and peroxide value. The national standard test methods use acid-base titration and redox titration, respectively.
These two methods require calibration of the titrant and in the laboratory. The edible oleic acid speed measuring card (hereinafter referred to as the quick measuring card) adopts the color contrast of the paper color and the standard color plate contrast method, which not only accelerates the detection speed, but also solves the problem of field inspection.
Scope of application:
The method is suitable for rapid quantitative determination of acid value of edible vegetable oil and peroxide value.
Action principle:
The use of drug free fatty acid and edible vegetable paper produced in oleic acid lost the color reaction in order to reflect the degree of rancidity. The peroxide produced by the oxidation of edible vegetable oil reacted with the reagent in the test paper to reflect the extent of the oxidation of the oil.
Experimental material:
Quick test card: sealed package, the test strip taken out of the package should be used within lO minutes. After the opening of the test paper, the government will use it for 1 months.
The acid value of paper with red marks, such as the peroxide value of paper such as with grey traces, the paper had been contaminated or has expired.
