A rapid method for detecting adulteration of sesame oil

A sesame oil, fast technology, applied in color/spectral characteristic measurement, material analysis by observing the influence on chemical indicators, and analysis by making materials undergo chemical reactions, etc., can solve high cost, complicated operation, and difficulty in application and promotion Large and other problems, to achieve the effect of short inspection time, good repeatability, loose inspection conditions and environmental requirements

Inactive Publication Date: 2011-12-21
河南省农科院农副产品加工研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for quickly detecting adulterated sesame oil to solve the proble...

Method used

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  • A rapid method for detecting adulteration of sesame oil
  • A rapid method for detecting adulteration of sesame oil
  • A rapid method for detecting adulteration of sesame oil

Examples

Experimental program
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Effect test

Embodiment 1

[0027] For the following pure oil samples, sesame oil (hydraulic pressure), first grade soybean oil, soybean crude oil, first grade rapeseed oil, rapeseed crude oil and third grade cottonseed oil, the steps are as follows:

[0028] (1) Weigh 1.000g each of pure sesame oil, first-grade soybean oil, soybean crude oil, first-grade rapeseed oil, rapeseed crude oil, and third-grade cottonseed oil into 10mL stoppered colorimetric tubes;

[0029] (2) Add 2.8mL of petroleum ether to the colorimetric tube that has been filled with oil, shake well, then add 1.2mL of trichloroacetic acid and 0.01g of benzoyl peroxide, and dilute to 5mL. Vortex and mix for 30s, let stand for 15min, and observe the color change. At the same time, do a blank control experiment, that is, take each oil sample of the same quality, without performing color development, directly set the volume to 5mL, and compare with the color reaction. The results are shown in Table 1.

[0030] Table 1

[0031] ...

Embodiment 2

[0034] The color reaction of sesame oil (hydraulic pressure) mixed with different proportions of first-grade soybean oil is carried out as follows: (1) According to the mass percentage, weigh different quality sesame oil and first-grade soybean oil in a reagent bottle, mix them evenly, and make Sesame oil samples with different adulteration ratios, the blending ratios of soybean oil were 0, 5%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% ;

[0035] (2) Weigh 0.500g of sesame oil mixed with different proportions of first-grade soybean oil into 10mL stoppered colorimetric tubes;

[0036] (3) Add 2.3mL of petroleum ether to the colorimetric tube that has been filled with oil, shake well, then add 1.2mL of trichloroacetic acid and 0.05mL of peracetic acid, dilute to 5mL, vortex for 30s, let stand for 15min, observe color change, see results figure 1 ;

[0037] (4) At the same time, immediately carry out visible spectrophotometric scanning when the color develops and stand...

Embodiment 3

[0040] Carry out color reaction to 5 sesame oil samples purchased randomly on the market, the steps are as follows:

[0041] (1) Weigh 1.000g of pure oil sample into 10mL stoppered colorimetric tube;

[0042](2) Add 2.8mL of petroleum ether to the colorimetric tube that has been filled with oil, shake well, then add 1.2mL of trichloroacetic acid and 0.01mL of hydrogen peroxide, and dilute to 5mL. Vortex and mix for 30s, let stand for 15min, observe the color change;

[0043] (3) The sesame oil samples display grass green, blue-green, light blue, light pink, and light green from left to right. It can be judged that these sesame oil samples are mixed with rapeseed oil, pure sesame oil, mixed with Cottonseed oil blended, soybean oil blended in large amounts, soybean oil blended in small amounts;

[0044] (4) Using a spectrophotometer to measure, it can be seen that the oil samples from left to right are about 60% of rapeseed oil, 100% of sesame oil, about 75% of cottonseed oil,...

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Abstract

The invention belongs to the technical field of sesame oil quality monitoring, in particular to a method for rapidly detecting adulteration of sesame oil. Add an organic solvent to the oil sample to be tested, then add a color developer and a color aid; shake the reaction for 5-60s and then let it stand for 60-900s; judge whether the sesame oil is mixed with other oils according to the color development of the solution, pure sesame oil color development Later blue-green. The method for rapidly detecting sesame oil adulteration of the invention is simple and convenient to operate, low in cost, accurate in identification and good in repeatability.

Description

technical field [0001] The invention belongs to the technical field of sesame oil quality monitoring, in particular to a method for rapidly detecting adulteration of sesame oil. Background technique [0002] Sesame oil is a favorite condiment and a good food for cooking. It not only has a unique flavor, but also has rich nutritional value. The content of unsaturated fatty acids such as oleic acid and linoleic acid is more than 80%, and it is also rich in antioxidants. The active substances such as natural vitamin E and various forms of lignans such as sesamin, sesamolin, and sesamol. Due to the rich nutrition and market value of sesame oil, its market price is much higher than that of common bulk oils such as soybean oil, rapeseed oil and cottonseed oil. Some unscrupulous producers add other cheap vegetable oils or even non-edible oils such as tung oil, mineral oil, and castor oil to sesame oil in order to make higher profits, or directly mix low-priced vegetable oil with f...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/78
Inventor 黄纪念张丽霞张勋侯传伟芦鑫孙强宋国辉韩宝丽
Owner 河南省农科院农副产品加工研究所
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