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Method for identifying quality of edible oil with low-field NMR (Nuclear Magnetic Resonance)

A low-field nuclear magnetic resonance and nuclear magnetic resonance technology, which is applied in the direction of using nuclear magnetic resonance for analysis, can solve problems such as oil quality inspection, and achieve the effects of short time consumption, improved accuracy and stability, and fast detection speed.

Active Publication Date: 2011-02-16
SUZHOU NIUMAG ELECTRONICS TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Nowadays, the catering industry consumes a large amount of cooking oil every day, but there is no better way and means to test the quality of the oil

Method used

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  • Method for identifying quality of edible oil with low-field NMR (Nuclear Magnetic Resonance)
  • Method for identifying quality of edible oil with low-field NMR (Nuclear Magnetic Resonance)
  • Method for identifying quality of edible oil with low-field NMR (Nuclear Magnetic Resonance)

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Embodiment

[0028] Embodiment: The present invention discloses a method for identifying the quality of edible oil by low-field nuclear magnetic resonance, and its specific implementation steps are as follows:

[0029] 1) Sample test analysis: Transverse relaxation analysis of genuine oil and inferior oil is carried out through CPMG sequence, and the one-dimensional inverse Laplacian algorithm is used as the inversion algorithm of transverse relaxation time spectrum to obtain the relaxation values ​​of genuine oil and inferior oil. Relaxation time spectrum, if the relaxation time spectra of the two do not completely overlap, conduct transverse relaxation analysis on their mixed oil, and get the relaxation time spectrum; if the non-overlapping part of the genuine oil and the inferior oil is in the mixed oil If it still exists and is proportional to the inferior oil content in the mixed oil, this part is selected as the oil quality identification standard; if the non-overlapping part of the g...

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Abstract

The invention discloses a method for identifying the quality of edible oil with low-field NMR (Nuclear Magnetic Resonance), suitable for identifying and measuring genuine edible oil and inferior drainage oil. The method rapidly and accurately identifies the genuine edible oil and the inferior drainage oil by using the difference between the relaxation time map data of the genuine edible oil and the inferior drainage oil as a main identification reference, using NMR signals of the genuine edible oil and the inferior drainage oil as main observation objects and using the comparison and the analysis of the transversal relaxation time map data of the genuine edible oil and the inferior drainage oil as main measures. The method of the invention has high measuring result accuracy, good repetition and stability, short duration, and the like, is beneficial to the realization of the one-site identification of the qualities of various kinds of edible oil and provides reliable oil quality information for detecting the qualities of various kinds of edible oil.

Description

technical field [0001] The invention belongs to the field of low-field nuclear magnetic resonance oil quality analysis, and in particular relates to a method for identifying edible oil quality by low-field nuclear magnetic resonance. Background technique [0002] People eat a certain amount of edible oil or edible oil processed food directly or indirectly every day. The quality of edible oil is directly related to human diseases and health. In recent years, lawbreakers have appeared all over the country to collect catering waste oil or low-quality oil (waste oil). After processing, they sell it to restaurants and oil workshops at very low prices, and mix it into edible oil for huge profits. Waste oil has a complex composition and contains a variety of toxic and harmful components. [0003] Although many physical and chemical indicators of waste oil are different from normal edible oils, refined "gutter oil" is difficult to distinguish from ordinary edible oil in terms of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N24/08
Inventor 杨培强王欣刘宝林周凝张英力陈路平
Owner SUZHOU NIUMAG ELECTRONICS TECH
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