Method for rapidly detecting oxidative rancidity expiration date of grease-containing products

Abstract

The invention relates to a method for quickly detecting the oxidative rancidity expiration date of grease-containing products, which comprises the following steps of: (1) accurately weighing a greasesample, putting the grease sample into a triangular flask, covering a bottleneck with 6 layers of raw white cloth and 1 layer of kraft paper, tying the bottleneck with a cotton rope, putting the triangular flask into a constant-temperature oven, sampling every day until rancidity is detected by sensory evaluation, storing the samples obtained every day in a refrigerator at -4 DEG C, and measuringthe peroxide values together after a strengthening test is finished; (2) performing GC-MS headspace gas quality analysis on the grease sample finally obtained in the step (a) and the grease sample inthe previous day, and performing comparative analysis on the gas quality map components of the two samples to determine the matching degree of sensory evaluation and gas quality analysis judgment so as to determine the mutation period of sensory rancidity at the temperature corresponding to strengthening; and (3) constructing an oxidative rancidity prediction model. The method disclosed by the invention is short in time, relatively accurate and capable of quantitatively detecting the rancidity expiration date of grease products.

Description

technical field [0001] The method of the invention belongs to the field of food, and is a quantitative inspection method that can quickly inspect whether oil-containing products are spoiled during the shelf life Background technique [0002] Shelf life refers to the shelf life of food (shelf-life) refers to the period of time that food is stored under recommended conditions, can maintain safety; ensure ideal sensory, physical and microbiological characteristics; retain any nutritional value declared on the label. With the strengthening of my country's economy and the continuous improvement of people's living standards, people have put forward higher requirements for food quality, and shelf life has become one of the important basis for consumers to understand food quality, which is of great significance to ensure food safety. Generally speaking, the shelf life is marked on the label on the outer packaging of the food. However, there is often a large gap between the traditio...

AI Technical Summary

Problems solved by technology

However, this method can only qualitatively predict the product, not only the reinforcement cycle is long, but the accuracy of the evaluation is not high

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