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.
CN1987424AInactive Publication Date: 2007-06-27TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
0 Cites 4 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Publication Date
2007-06-27
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

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.
Need to check novelty before this filing date? Find Prior Art

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