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Method for authenticating plant oil and waste food oil through SIFT/MS

A technology of waste meal and vegetable oil, applied in the direction of measuring device, material analysis by electromagnetic means, instrument, etc., can solve the problem that there is no accurate, fast and convenient method for detecting waste meal oil such as waste oil, etc., and achieve the measurement speed Fast, easy to use, time-saving and low-cost effects

Inactive Publication Date: 2016-01-27
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen that although a lot of research work has been done in China, so far, there is no accurate, fast and convenient method for detecting waste cooking oil such as waste oil.

Method used

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  • Method for authenticating plant oil and waste food oil through SIFT/MS
  • Method for authenticating plant oil and waste food oil through SIFT/MS
  • Method for authenticating plant oil and waste food oil through SIFT/MS

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] This example studies vegetable oils from different sources (different soybean oil, peanut oil, rapeseed oil, camellia oil, sunflower oil, blended oil (from soybean oil, peanut rapeseed oil as raw materials)), animal offal oil, frying oil, original waste oil Contents of 28 components including thermal decomposition products, exogenous pollutants, and oxidative decomposition products in 86 samples including refined waste oil, etc. The specific methods are as follows:

[0051] Put 5 grams of sample into a 540mL glass bottle, seal it with a rubber seal that can be penetrated by a stainless steel needle, put it in a constant temperature water bath at 65°C and keep it for 60 minutes, and set the determination of reactive ions, detection ions and the used ions according to the requirements in Table 1. Reaction rate constant; the first quadrupole and the second quadrupole stabilization time of SIFT-MS are 25ms and 10ms respectively; microwave power: 50W; air is used as the ion s...

Embodiment 2

[0063] Put 5 grams of unknown oil sample into a 540mL glass bottle, seal it with a rubber seal that can be penetrated by a stainless steel needle, put it in a constant temperature water bath at 65°C and keep it for 60 minutes, set up the reaction ion, detection ion and all The reaction rate constant of ions is adopted; the stabilization time of the first quadrupole and the second quadrupole of SIFT-MS are 25ms and 10ms respectively; microwave power: 50W; air is used as the ion source gas; 3KPaL / s; the gas flow rate of sample and capillary is 0.45 and 1.3KPaL / s respectively. The scanning time used is 60s; the calculation delay time is 5s; the sampling period is 100ms; the precursor is 25ms; the sample inlet temperature is 120℃; the carrier gas argon pressure is 200KPa; 5Pa.

[0064] When the 1,3-propanediol in the oil sample is 1150ng / mL, the acrolein is 4610ng / mL, but does not contain furfural, 2-pentylfuran, butyric acid, hexanoic acid, limonene, according to Table 2, it can...

Embodiment 3

[0066] Add 5 grams of unknown oil sample into a 540mL glass bottle, seal it with a rubber sealing ring that can be penetrated by a stainless steel needle, put it into a constant temperature water bath at 65°C and keep it for 60 minutes, the measurement method is the same as in Example 1.

[0067] When 1,4-butyrolactone 1100ng / mL, furan 140ng / mL, furfural 120ng / mL, acrylamide 400ng / mL, citral 380ng / mL, methyl piperonol 30ng / mL were detected in the unknown oil sample, 4-isopropyltoluene 3000ng / mL, it can be judged by referring to Table 2 that the oil sample belongs to the waste cooking oil of waste oil, which is consistent with the actual result.

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Abstract

The invention belongs to the technical field of food safety detection, and particularly relates to a method for authenticating plant oil and waste food oil through SIFT / MS. The method detects 28 components, namely, furan, acrylamide, furfural, 2-amyl furan and acrolein which are produced by heating and inducing grease, external pollutants including citral, limonene, diallyl sulfide, m-cresol, 4-isopropyltoluene and methyl chavicol, oxidation decomposition aldehyde products including heptanal, octanal, hept-2-enal, 3-hexene aldehyde, trans-2-octen-1-al and (E, E)-2- decadienal, oxidation decomposition acid products including acetic acid, propionic acid, butyric acid, valeric acid and caproic acid, and other oxidation decomposition products including acetone, butanone, 2-heptanone, 1,3-propanediol, 1,4-butyrolactone and propyl propionate, thereby authenticating plant oil and waste food oil. The method saves reagent cost, is free of advanced concentration, column separation and standard products, and has the advantages of being high in sensitivity, simple, rapid, accurate and the like.

Description

technical field [0001] The invention belongs to the technical field of food safety detection, and in particular relates to a method for identifying vegetable oil and waste table oil by using SIFT / MS. Background technique [0002] At present, the detection and identification of edible oils and fats such as vegetable oils are mainly to measure the changes of their exogenous pollutants and their inherent components (also known as endogenous components). ① For exogenous pollutants, the main tests are: conventional physical and chemical indicators - moisture content, specific gravity, refractive index, acid value, peroxide value, carbonyl value, iodine value, etc.; heavy metals - Fe, Pb, Cr, Zn , Mn and related conductivity, etc.; animal fat possibility—cholesterol; mineral oil pollution——C 9-14 Secondary product of oxidative deterioration of alkanes and oils - acetaldehyde; surfactant (detergent residue) - sodium dodecylbenzene sulfonate, mycotoxin - aflatoxin B, etc. ② For th...

Claims

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Application Information

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IPC IPC(8): G01N27/62G01N27/626
Inventor 黄雪松
Owner JINAN UNIVERSITY
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