Method for detecting illegal cooking oil doped in edible blend oil

A technology for blending oil and waste oil, applied in Raman scattering, material excitation analysis, etc., can solve difficult method steps, cumbersome problems, etc., and achieve the effects of good versatility, accurate results, and rapid identification

Inactive Publication Date: 2017-08-04
NINGBO ZHENGMING DETECTION CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0009] In view of the above problems, the purpose of the present invention is mainly to provide a method for accurately detecting edible oil mixed with waste oil, so as to improve the convenient and accurate detection of waste oil in daily life and market monitoring departments, and to solve the problem of waste oil in the prior art. Difficulty in oil discovery and detection and cumbersome method steps

Method used

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  • Method for detecting illegal cooking oil doped in edible blend oil
  • Method for detecting illegal cooking oil doped in edible blend oil

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Experimental program
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Effect test

Embodiment 1

[0039]1) Instrument: Metrohm MIRA Raman spectrometer; 2) Sample to be tested 1: Soybean oil, peanut oil and refined waste oil are prepared according to the mass ratio of 1:1 to prepare the oil sample to be tested; The laser light source measures the Raman spectra of pure samples of soybean oil and peanut oil, and determines that the components in each are at 1200-1300cm -1 and at 1400-1600cm -1 There are two characteristic peaks at the position, and the total peak area S of the characteristic peaks at the above positions is calculated 1 =89.5, S 2 =56.8, determine that the maximum value is S 1 and minimum S 2 ;

[0040] Adopt the Raman spectrogram of tested sample oil 1 under the same condition as figure 2 The spectrum of a in 1200-1300cm -1 and at 1400-1600cm -1 There is a characteristic peak at , calculate the area S of the characteristic peak x = 61.9;

[0041] Contrast S 2 x 1 , it is determined that the sample oil is mixed with waste oil, and the judgment resul...

Embodiment 2

[0043] 1) Instrument: Metrohm MIRA Raman spectrometer 2) Sample 2 to be tested: soybean oil, peanut oil, and refined waste oil are prepared into the oil samples to be tested according to the mass ratio of 1:1:4; The incident laser light source measures the Raman spectra of pure samples of soybean oil and peanut oil, and determines that the components in each are at 1200-1300cm -1 and at 1400-1600cm -1 There are two characteristic peaks at the position, and the total peak area S of the characteristic peaks at the above positions is calculated 1 =89.5, S 2 =56.8, determine that the maximum value is S 1 and minimum S 2 ;

[0044] Adopt the Raman spectrogram of tested sample oil 1 under the same condition as figure 2 The b spectrum in 1200-1300cm -1 and at 1400-1600cm -1 There is a very faint peak at , calculate the area S of the characteristic peak y = 6.9;

[0045] Contrast S y 2 , it is determined that more than half of the waste oil is mixed in the sample oil, and t...

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Abstract

The invention discloses a method for detecting illegal cooking oil doped in edible blend oil. The method specifically comprises the following steps: measuring Raman spectrums of pure substances in various components of N kinds of blend oil in the blend oil by adopting a Raman spectrometer, calculating the total peak area of respective Raman spectrums at two characteristic peaks of 1200-1300cm<-1> and 1400-1600cm<-1>, and determining the maximum value Smax and minimum value Smin thereamong; measuring whether the measured blend oil has the characteristic peak at the two previous bands, and if the characteristic peak exists and the peak area is Sx, determining whether or not the illegal cooking oil is doped in the blend oil by comparing the Sx, Smax and Smin, and roughly determining whether the doping amount is in the majority. The method disclosed by the invention is simple, feasible, accurate and reliable, and compared with the common measurement method, the method disclosed by the invention has higher practicality.

Description

[0001] Technical field: [0002] The present application relates to the field of edible oil detection, in particular to a method for accurately detecting edible oil mixed with waste oil. [0003] Background technique: [0004] Edible oil is a widely used raw material in daily life, and its quality directly affects diet quality and human health. Oxidation reaction of edible oil occurs during the cooking process, and then the oxidized products such as aldehydes, ketones, and acids are generated, which not only make it taste rancid, but also reduce the nutritional quality of food. The hydroperoxides and free radicals produced in this process can even cause the body to age and cause various diseases such as cardiovascular disease and tumors. The waste oil that has appeared in recent years contains a large amount of used grease. The nutritional components of these greases no longer exist, and a large amount of hydroperoxides and free radicals are replaced, which are extremely unfav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
CPCG01N21/65
Inventor 马艳徐晓阳黄玲姚晓萍吴博文吴市学唐文华许卫剑
Owner NINGBO ZHENGMING DETECTION CO LTD
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