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Method for measuring doped gutter oil in edible vegetable oil

A technology of edible vegetable oil and its determination method, which is applied in the field of determination of edible vegetable oil mixed with waste oil, and can solve the problems of non-universality and insignificance

Pending Publication Date: 2018-11-23
XINJIANG UYGUR AUTONOMOUS REGION PROD QUALITY SUPERVISION & INSPECTION RES INST
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Problems solved by technology

[0003] The research methods currently reported basically use exogenous substances as the measurement index. Since the production of waste oil is related to local living habits, for example, the intake of pepper in some areas is extremely low. If capsaicin is used as the exogenous index of refined waste oil Not significant, so the method is not universal

Method used

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  • Method for measuring doped gutter oil in edible vegetable oil
  • Method for measuring doped gutter oil in edible vegetable oil
  • Method for measuring doped gutter oil in edible vegetable oil

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Embodiment

[0054] Reagents and Materials

[0055] The test water used in this standard should meet the standard of GB / T 6682 first-class water. Unless otherwise specified, all reagents used are analytically pure (or redistilled analytically pure) and stored in glass bottles.

[0056] 3.1 Acetonitrile

[0057] 3.2 Ethanol

[0058] 3.3 Methanol: chromatographically pure

[0059] 3.4 Glacial acetic acid

[0060] 3.5 NaCl

[0061] 3.6 concentrated sulfuric acid

[0062] 3.7 Purification of 2,4-dinitrophenylhydrazine (DNPH): Weigh about 20g of 2,4-dinitrophenylhydrazine into a beaker, add 167mL of acetonitrile and 500mL of water, stir until completely dissolved, and place overnight. Filter the crystals with qualitative filter paper, wash with 50mL water for 3 times, and then wash with 50mL ethanol for 2-3 times, then place in a desiccator for later use.

[0063] 3.8 Preparation of derivative solution: 3.0mL concentrated H 2 SO 4 (concentration of 97%) was added to a beaker containing...

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Abstract

The invention relates to a method for measuring doped gutter oil in edible vegetable oil. The method comprises the following steps of (1) deriving of a vegetable oil sample: deriving the vegetable oilsample by a 2,4-dinitrophenylhydrazine deriving solution; (2) drawing of an external standard working curve; (3) detection of the sample. The invention also relates to application of a reaction product (aldehyde phenylhydrazone) of fatty aldehyde and 2,4-dinitrophenylhydrazine to detect the doped gutter oil in the edible vegetable oil.

Description

technical field [0001] The invention relates to a method for measuring waste oil doped in edible vegetable oil. Background technique [0002] At present, there is no national standard method for the detection of waste oil in China, and there are few research reports on the detection of waste oil. The main reason is that the composition of waste oil is relatively complex, and the specific physical and chemical indicators of its detection are difficult to confirm, resulting in qualitative and quantitative difficulties. The domestic determination of waste oil is mainly through sensory, physical and chemical index detection, exogenous substance pollution detection and instrumental method detection. After the waste oil crude oil is treated by oxidation, adsorption and other technologies, the color of the oil is obviously lighter, the viscosity is reduced, and the irritating smell disappears. Therefore, the waste oil cannot be easily detected only by sensory detection of color, tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06G01N2030/047
Inventor 袁辉龙泽荣鹿毅李漫江
Owner XINJIANG UYGUR AUTONOMOUS REGION PROD QUALITY SUPERVISION & INSPECTION RES INST
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