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Hotwash oil inspection method

A detection method, hogwash oil technology, applied in the direction of material resistance, etc., can solve the problems of lack of convenient, fast and accurate detection instruments, etc., and achieve the effect of convenient market supervision, convenient method, real-time and fast detection

Inactive Publication Date: 2012-05-02
HUNAN CITY UNIV
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  • Description
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AI Technical Summary

Problems solved by technology

Market supervision and law enforcement departments lack convenient, fast and accurate testing instruments, and cannot fundamentally solve the problem of hogwash and oil flooding

Method used

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with embodiment.

[0014] A kind of detection method of hogwash oil, it comprises the following steps:

[0015] ⑴ In terms of volume, oil sample: solvent: deionized water is 1:2~3:1.5~2.5. Take oil sample, solvent, and deionized water in a beaker for later use; this example is 1:2.5:2.

[0016] (2) Add the solvent to the oil sample to dissolve the oil sample, then add deionized water to mix and stir;

[0017] (3) After standing and stratifying, use a separatory funnel to remove the lower aqueous phase;

[0018] (4) Measure the conductivity of the lower aqueous phase.

[0019] The solvent of the present invention is one of petroleum ether or ether or n-hexane or ethyl acetate. The present embodiment uses petroleum ether.

[0020] The stirring method of the present invention is one of constant temperature oscillation, electromagnetic stirring or ultrasonic oscillation. In this embodiment, the ultras...

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Abstract

The invention discloses a convenient, rapid and accurate hotwash oil inspection method. The hotwash oil inspection method is characterized in that the hotwash oil inspection method includes the following steps: (1) oil sample, solvent and deionized water, which are 1:2 to 3:1.5 to 2.5 by volume, are respectively poured into a beaker for later use; (2) the solvent is added into the oil sample to dissolve the oil sample, and the deionized water is then added and mixed in the solution; (3) after the solution is kept still to be layered, a separating funnel is used for taking out the lower layer of aqueous phase; (4) the conductivity of the lower layer of aqueous phase is determined. Because the conductivity of the extract of hotwash oil is quite different from the conductivity of the extract of acceptable edible oil, the method is convenient, rapid and accurate, so that the market supervision department and the law enforcement department can conveniently carry out real-time, rapid field inspection, and thereby the problem of the wide spread of hotwash oil can be fundamentally solved.

Description

technical field [0001] The invention relates to a method for detecting oil products, in particular to a method for detecting hogwash oil. Background technique [0002] With the improvement of living standards, people are more and more concerned about food safety issues. In recent years, driven by huge profits, the adulteration and counterfeiting of edible oil have intensified. At present, the chemical identification method is mainly used for oil product testing, but it is limited to laboratory testing, and the edible oil entering the market can only rely on the sensory identification of law enforcement officers. Market supervision and law enforcement departments lack convenient, fast and accurate testing instruments, and cannot fundamentally solve the problem of hogwash and oil flooding. Therefore, it is necessary to realize real-time and rapid detection of oil products. Contents of the invention [0003] The purpose of the present invention is to provide a convenient, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/06
Inventor 石清丽喻旭东
Owner HUNAN CITY UNIV
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