Identification method for illegal cooking oil

A technology for waste oil and grease, applied in the field of waste oil identification, can solve the problems of difficulty in popularization, can only be qualitative, expensive instruments, etc., and achieve the effects of high instrument penetration, strong reproducibility and moderate price.

Inactive Publication Date: 2012-07-18
李涛 +1
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Problems solved by technology

[0015] When using instrument detection methods, because low-field nuclear magnetic resonance, Raman spectroscopy and other instruments are very expe

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  • Identification method for illegal cooking oil
  • Identification method for illegal cooking oil
  • Identification method for illegal cooking oil

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Embodiment Construction

[0046] The hygienic indicators in the hygienic standards for edible vegetable oil and other oils reflect the basic characteristics of edible finished oils, and can only judge the quality of oils and fats. Using hygienic indicators as direct evidence for judging waste edible oils is very one-sided and is not conducive to the implementation of the law. Food hygiene supervision. At the same time, the sources of waste edible oils and fats are complicated, such as frying oil, gutter oil, etc. In actual work, it is impossible to test the samples after distinguishing their sources. Therefore, the identification indicators must have relatively universal applicability and operability. Based on the above In principle, the present invention accounts for the mass fraction of fatty acid total amount as the standard of detection waste oil with seventeen acid in oils and fats.

[0047] Heptadecanoic acid, CAS number: 506-12-7, seventeen acid, English name: Heptadecanoic acid. It is a satura...

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Abstract

The invention provides an identification method for illegal cooking oil. According to the identification method, the fraction of the mass of heptadecanoic acid in grease to the total mass of fatty acid is determined so as to confirm if oil is the illegal cooking oil. During actual detection, the method includes subjecting a sample to saponification and methylation, determining by means of gas chromatography-mass spectrometry, obtaining a mass spectrometry total ion chromatogram under the setting chromatographic condition and mass spectrometry condition, quantifying by means of a peak area or peak height normalization method, and judging if the oil is the illegal oil according to the mass fraction. The identification method has the advantages of being explicit in target, obvious in characteristic, easy to operate, high in reproducibility, applicable to fast detection, and the like.

Description

technical field [0001] The invention relates to a method for identifying waste oil. Background technique [0002] Waste oil is a general concept, translated into English as "illegal cooking oil", also known as "swill-cooked dirty oil", which is a general term for all kinds of inferior oils. Waste oil among the present invention refers to following three classes: the one, waste oil in a narrow sense, is about the greasy floating thing in the sewer through processing, the oil that extracts; Oil, also known as "swill oil" and "swill oil"; the third is the oil produced after processing and refining inferior pork and beef, viscera, skin or other animal tissues. [0003] At present, the problem of waste oil is prominent in our country, which has attracted great attention from all levels of society, and even caused some people to panic, which has greatly affected the image of the government and regulatory agencies in the hearts of the people. [0004] From a medical and physiolog...

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Application Information

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IPC IPC(8): G01N30/72G01N30/02G01N30/06
Inventor 李涛朱小红刘海静刘继平徐长根张丹林芳杨智海
Owner 李涛
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