Method for detecting peroxide value of food grease

Abstract

The invention provides a method for detecting a peroxide value of food grease. The method comprises the steps of: S1, soaking a color developing slice in a color developing solution, taking out the color developing slice after soaking, and drying the color developing slice for later use; S2, taking crushed grease processed food or nut powder, putting the food or nut powder on the color developingslice, and covering the color developing slice with aluminum-foil paper; S3, and heating the color developing slice in the step S2 on a heater, observing color changes of the color developing slice, and comparing the color developing slice with a colorimetric card to judge the content of the peroxide value in the food grease. The method conforms to the Chinese standard, can detect the content of peroxide in grease in a short time on site, and judges whether the food is fresh or not, thereby improving the food detection efficiency, and preventing unqualified food from flowing into the market.

Description

technical field [0001] The invention belongs to the field of food biological detection, in particular to a method for detecting the peroxide value of food oil. Background technique [0002] In daily life, consumers are most concerned about whether the purchased oil-processed foods and plant nut foods are fresh or spoiled. It is understood that the national standard GB19300-2014 "National Food Safety Standard Nuts and Seed Foods" stipulates that the peroxide value of nut foods should be less than 0.80g / 100g. When the peroxide value in nuts exceeds the standard, nut foods will have a sour and pungent smell, and eating such nut products will have a bitter and sour taste. This not only affects the taste, but also greatly reduces its nutritional value. [0003] The peroxide value is an index indicating the degree of oxidation of fats and fatty acids, and is used to indicate whether food has deteriorated due to oxidation. By detecting the peroxide value of food or plant nuts ma...

AI Technical Summary

Problems solved by technology

The current peroxide value detection test paper on the domestic market can only quickly detect the peroxide value in edible oils, and cannot be used to detect the peroxide value in oil-processed foods and nut seeds. If the detection of oil-processed foods and nuts The peroxide value in seeds needs to be sampled and sent to a professional testing agency for testing. The testing procedure is cumbersome, and it takes a few days to get the test results, so it is impossible to quickly test on-site