Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for detecting oil carbonyl value

A determination method and technology of carbonyl value, which can be used in the measurement of color/spectral properties, etc., and can solve the problems of complicated operation, large amount of solvent, and long time.

Inactive Publication Date: 2007-06-27
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses a large amount of solvent and is cumbersome to operate, and takes a long time, etc. It is not suitable for on-site use in oil and fat food factories.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for detecting oil carbonyl value
  • Method for detecting oil carbonyl value

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] Weigh 0.04 ~ 1.0g of oil sample and put it into a 10ml volumetric flask, and dilute to volume with n-butanol solution. Extract 1mL of the sample solution into a 15ml centrifuge tube, add 1ml of 2,4-dinitrophenylhydrazine solution (n-butanol in volume), cover with a stopper, shake well, and heat in a water bath at 40°C for 20min. After the reaction, take it out and cool it to room temperature with running water, add 8ml of 2.5% KOH n-butanol solution to develop the color. The test tube was centrifuged at 3000 rpm / min for 5 min, and the supernatant was taken to measure its absorbance at 380-420 nm.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

For measuring carbonyl value, which is as one of index for determining whether oil and fat is oxidized or in spoilage, previous method uses toxic solvent benzene, and possesses disadvantages of great quantity of solvent, fussy operation, and long operation time so that it is not suitable to use in site. The invention discloses quick, accurate, and safety detection method applicable to working site. The invention uses safe normal butyl alcohol as organic solvent. Using reaction between carbonyl compound in oil and fat, and 2,4 - dinitrophenyl hydrazine generates 2,4 - dinitro hydrazo benzene. Under alkalinity condition, 2,4 - dinitro hydrazo benzene generates quinone in red color of grape wine. The said color at place of 380nm-420nm possesses extinction characteristic. Thus, using colorimetry can process quantitative analysis.

Description

technical field [0001] Volatile and non-volatile carbonyl compounds are generated when oils (animal oils, vegetable oils, mineral oils) are oxidized and spoiled. The increase of carbonyl compounds affects the color, aroma and taste of oil and oil processed food. Therefore, the content of carbonyl compounds in oil is an important indicator for judging the oxidation and deterioration of oil. Background technique [0002] In the past, the method for measuring carbonyl value used a toxic solvent (benzene), and the oil sample and 2,4-dinitrophenylhydrazine were dissolved in a benzene solvent and heated at 60 degrees for 30 minutes. Color Reaction The carbonyl value was determined colorimetrically by absorbance at 440 nm. This method uses a large amount of solvent, is cumbersome to operate, takes a long time, etc., and is not suitable for on-site use in oil and fat food factories. Contents of the invention [0003] The present invention uses safe and non-toxic n-butanol (also...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N21/31
Inventor 李昌模
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com