Method for identifying kitchen waste oil

Abstract

The invention discloses a method for identifying kitchen waste oil. The method comprises the following steps of (1) constructing a fingerprint database of different types of oil by measuring fatty acid compositions of all types of oil, constructing judgment functions of all the types of oil, and judging the kitchen waste oil serving as a given sample through the functions; (2) analyzing main components of all the types of oil by an analysis method according to an acid value, a peroxide value, polar components, metal elements and the trans-fatty acid content which serve as quality indexes, extracting the main components to construct a math evaluation model, identifying the kitchen waste oil according to main component score ranges of all the types of oil, determining the fatty acid compositions and the quality indexes of the sample to be detected through the verification test and analyzation, and then identifying the kitchen waste oil by the judgment method and the main component score method. According to the method, the adulteration quantity of more than 10 percent of the kitchen waste oil can be detected, and the method is an effective and high-reliability method for identifying the kitchen waste oil.

Description

technical field [0001] The invention belongs to the technical field of oil identification, and in particular relates to a method for identifying kitchen waste oil. Background technique [0002] Waste oil in the catering industry, including old frying oil and hogwash oil. Old frying oil is the inedible grease produced by repeated high-temperature frying in the catering industry. Hogwash oil is the inflow of washing dishes, dishes, and leftovers in the catering industry. Waste oil is fished in the grease trap, separated from slag and water, dehydrated by heating, decolorized and refined. It is also called "gutter oil". If these catering industry waste oils are simply refined and flowed back to the edible oil market, it will directly pose a great threat to the health of the people and bring direct harm to the society. [0003] According to statistics provided by the National Grain and Oils Information Center, the per capita annual consumption of edible oil in my country has re...

AI Technical Summary

Problems solved by technology

However, the viscosity of different edible oils is different, which is easy to cause misjudgment

[0012] To sum up, so far, there are actually many reports on the detection methods of kitchen waste oil, but there are more or less blind spots in the existing technologies, and the accuracy rate needs to be improved, which is not enough to serve as the "judge" of supervision

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