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Method for identifying adulterated oil and gutter oil through hydrogen nuclear magnetic resonance method

A technology of gutter oil and formant, which is applied in the analysis of nuclear magnetic resonance, etc., can solve the problem that the ratio of fatty acid cannot be used to judge the quality of oil

Active Publication Date: 2013-10-09
SEASONS BIOTECHNOLOGY (TAIZHOU) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the proportion of fatty acids determined by chromatography cannot be used as the basis for judging the quality of oil

Method used

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  • Method for identifying adulterated oil and gutter oil through hydrogen nuclear magnetic resonance method
  • Method for identifying adulterated oil and gutter oil through hydrogen nuclear magnetic resonance method
  • Method for identifying adulterated oil and gutter oil through hydrogen nuclear magnetic resonance method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Purchase five brands of peanut oil (Luhua, Fulinmen, Orchid, Risheng, Longda) from the supermarket and add them to the qualified oil sample library.

[0073] Shake the peanut oil sample in the packaging bucket, take a drop (about 20mg) of peanut oil with a dropper and add it to an NMR tube with a diameter of 5mm, add 0.6ml of deuterated chloroform as a solvent, dissolve the peanut oil, and use a 600M Hz NMR spectrum The instrument collects the hydrogen spectrum, the delay time is set to 25 seconds, and the cumulative sampling is 8 times, then according to the method described in step 4)-5), the integration is carried out, and the amount fraction and the relative amount of the four fatty acid triglycerides of peanut oil are calculated. error. The calculation results are shown in Table 1.

[0074] Table 1 The amount fraction and relative error of four fatty acid triglycerides in five brands of peanut oil

[0075]

[0076]

[0077] Note: N in the table 0 The calcu...

Embodiment 2

[0085] Five brands of soybean oil (Yuanbao, Jinlongyu, Weichen, Lubao, Fulinmen, all of which are genetically modified soybean oil) were purchased from supermarkets and added to the qualified oil sample bank. According to the method of embodiment 1, described sample is carried out 1 H NMR detects, integrates and calculates the mass fractions and relative errors of the four fatty acid triglycerides. The calculation results are shown in Table 2.

[0086] Table 2 The amount fraction and relative error of four kinds of fatty acid triglycerides in five brands of soybean oil

[0087]

[0088]

[0089] Note: N in the table 0 The calculation method of the average Na is five N 0 The sum is divided by 5. N 0 The calculation method of the relative error is (N of each brand 0 value-N 0 AverageNa) / N 0 meanNa;N 1 , N 2 , N 3 The calculation method of the average value and relative error is the same as that of N 0 same.

[0090] As can be seen from the data in the table, t...

Embodiment 3

[0099] Purchase four brands of sunflower oil (Fulinmen, Arowana, Duoli, Daomao) from supermarkets and add them to the qualified oil sample library. According to the method of embodiment 1, described sample is carried out 1 H NMR detects, integrates and calculates the substance fractions and relative errors of the four fatty acid triglycerides, and the calculation results are shown in Table 3.

[0100] Table 3 The amount fractions and relative errors of four kinds of fatty acid triglycerides in four brands of sunflower oil

[0101]

[0102]

[0103] Note: N in the table 0 The calculation method of the average Na is four N 0 and divided by 4. N 0 The calculation method of the relative error is (N of each brand 0 value-N 0 AverageNa) / N 0 Average Na; N in the table 1 , N 2 The mean and error are calculated with N 0 are calculated in the same way. N 3 The value is less than 1, do not use this method to calculate the average and relative error, according to the sun...

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Abstract

The invention relates to a detection method of adulterated oil and gutter oil. The method comprises steps of establishing a qualified grease and gutter oil sample base; implementing 1H nuclear magnetic resonance (NMR) detection to qualified grease samples, obtaining spectrograms of the grease samples, and calculating mass percentages of saturated fatty acid triglyceride, oleic acid triglyceride, linoleic acid triglyceride and linolenic acid triglyceride in each grease, determining a relative error of the four fatty acid triglycerides in greases of the same kind, and obtaining a proportional range of the mass percentages of the four triglycerides in greases of the same kind; adding to and establishing a mass percentage database of four triglycerides of qualified greases; implementing 1H NMR (1H Nuclear Magnetic Resonance) detection to a gutter oil sample, calculating mass percentage and proportion of four triglycerides, and establishing a mass percentage database of the four triglycerides of the gutter oil; carrying out same detection and calculation to a grease sample to be detected, and comparing an obtained proportion with proportions in two database, so as to judge whether the qualified grease is adulterated oil or gutter oil.

Description

technical field [0001] The invention belongs to the field of fat composition and content measurement, specifically through hydrogen nuclear magnetic resonance ( 1 H NMR) method to measure the content of four fatty acid triglycerides (i.e. saturated fatty acid triglyceride, oleic acid triglyceride, linoleic acid triglyceride, linolenic acid triglyceride) in different oils, and according to the four The different proportions of the fractions of fatty acid triglycerides are used to identify whether the detected oil sample is qualified oil, adulterated oil or waste oil. Background technique [0002] Waste oil generally refers to all kinds of low-quality oils that exist in daily life, such as recycled grease, repeatedly used frying oil, etc. Waste oil contains a variety of toxic and harmful substances. Eating waste oil may cause serious harm to human health, and long-term consumption may even cause cancer. Adulterated oil refers to unscrupulous oil traders mixing low-priced oil ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N24/08
Inventor 赵晓东贾强
Owner SEASONS BIOTECHNOLOGY (TAIZHOU) CO LTD
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