Method and device for detecting trans-oleic acid content in edible oil
A technology of trans-oleic acid and detection method, applied in material excitation analysis, Raman scattering and other directions, can solve the problems of cumbersome operation process, long time consumption, non-environmental protection and other problems
Active Publication Date: 2019-12-17
海南澳斯卡国际粮油有限公司
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The above method has disadvantages such as cumbersome operation process, long time-consuming, high cost and non-environmental protection, and cannot realize rapid detection
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[0038] The embodiments will be described in detail below in conjunction with the accompanying drawings.
[0039] A method for rapid detection of trans-oleic acid content in edible oil, the specific steps are as follows:
[0040] (1) Collect barreled edible oil samples N1, N2, N3...Nn of different types, brands, origins and capacities.
[0041] (2) Place the barreled edible oil sample 15N1 at the center of the detection table 4, after the laser beam generated by the laser 11 passes through the beam splitter 10, 90% of the laser energy is irradiated on the sample N1 (the side without the label paper) , the Raman scattered light passes through the bottom of the sample N1 and the detection platform 4, is converged by the convex lens 7, enters the optical fiber 3, and is finally detected by the Raman spectrometer 1, and its spectrum is denoted as S1. At the same time, in order to correct the impact of laser energy fluctuations, after the laser beam passes through the beam splitter...
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The invention discloses a content detection method and device for trans-oleic acid in edible oil. The method comprises the following steps: determining six Raman characteristic peaks of trans-oleic acid according to the Raman spectrum difference of an oleic acid and trans-oleic acid standard products; performing laser energy change and fluorescent background noise correction on the Raman spectrum of a sample; then determining the accurate positions of the six Raman characteristic peaks by means of temperature correction and performing optical path correction on the Raman strength of the characteristics peaks; and finally, fitting the six Raman characteristic peaks with temperature and humidity variables and the true trans-oleic acid content of the sample by multiple linear regression to establish a predication model of trans-oleic acid. The content of trans-oleic acid in a to-be-detected edible vegetable oil sample can be quickly detected by means of the predication model. The invention discloses the content detection method and device for trans-oleic acid in edible oil. The content of trans-oleic acid in edible oil can be quickly detected, so that the application range of the detection method is expanded, and the detection precision of the trans-oleic acid is improved.
Description
technical field [0001] The invention belongs to the technical field of food safety detection, and in particular relates to a method and a device for detecting the content of trans-oleic acid in edible oil. Background technique [0002] Trans oleic acid is an isomer of oleic acid, a trans fatty acid commonly found in hydrogenated vegetable oils. For edible oil, its refining and deodorization processes will produce a certain amount of trans-oleic acid. Trans oleic acid is a kind of harmful fatty acid. Excessive consumption will cause many harms to human health, such as promoting arteriosclerosis, inducing cardiovascular diseases and diabetes, affecting children's growth and development and neurological diseases. [0003] At present, the detection methods of trans-oleic acid content in edible oil mainly include gas chromatography, gas chromatography-mass spectrometry, capillary electrophoresis and high performance liquid chromatography. The above methods have disadvantages su...
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IPC IPC(8): G01N21/65
CPCG01N21/65
Inventor 孙通王晓刘木华莫欣欣
Owner 海南澳斯卡国际粮油有限公司