A kind of method for detecting adulteration of sesame oil

Abstract

The invention discloses a method for detecting adulteration of sesame oil, and relates to the technical field of sesame oil quality monitoring. Specifically, it includes: adding standard sesame oil into a mixed system made of polyphenol dyes and zinc ions for reaction, recording the color change as a standard color; adding the sesame oil sample to be tested into a mixed system made of polyphenol dyes and zinc ions React in the mixed system, record the color change and compare it with the standard color; judge whether the sesame oil is adulterated according to the color difference between the two. The invention is based on Zn 2+ Coordination with compounds in sesame oil can destroy Zn 2+ Weak complexation with polyphenol dyes (alizarin red S, bromopyrophenol red, pyrogallol red, catechol violet) to achieve color recovery of polyphenol dyes. It is of great significance to protect the health and interests of consumers, to detect and identify relevant departments, and to maintain a good market environment.

Description

technical field [0001] The invention relates to the technical field of sesame oil quality monitoring, in particular to a method for detecting adulteration of sesame oil. Background technique [0002] Sesame oil is a vegetable oil with special flavor extracted from sesame seeds, which contains a large amount of active substances such as lignans, vitamin E, sesamol, and has antioxidant, anti-cancer and anti-aging effects. It is loved all over the world for its unique aroma and excellent nutritional value. Driven by interests, in recent years, counterfeit and shoddy sesame oil products have appeared on the market. In the adulteration process, cheap vegetable oils are often used to add flavors and colors to mimic real sesame oil. [0003] At present, there are traditional analytical methods such as fatty acid spectroscopy, nuclear magnetic resonance spectroscopy, chromatography, etc. to detect adulteration of sesame oil at home and abroad. These analytical methods have high ac...

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Problems solved by technology

[0003] At present, there are traditional analysis methods such as fatty acid spectroscopy, nuclear magnetic resonance spectroscopy, and chromatography to detect the adulteration of sesame oil at home and abroad. These analysis methods have high accuracy and reliability, but they need to rely on expensive equipment and strict experiments. The room conditions, sample processing is not only complicated, but also the analysis speed is very slow, which cannot meet the needs of rapid detection in the market

The traditional fluorescence spectrum analysis method has the advantages of high sensitivity, quantitative accuracy, and less sampling volume in the qualitative analysis of edible vegetable oils, and some research results have been achieved in this area at home and abroad, but the fluorescence spectrum peaks of edible vegetable oils have overlapping defects. A lot of fluorescence information is hidden in the main peak, which increases the difficulty of analyzing the fluorescence spectrum

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