Chemically modified electrode, preparation thereof and method for rapid determination of acid value of plant oil

Abstract

The invention discloses a chemically modified electrode, preparation of the chemically modified electrode and a method for rapid determination of acid value of plant oil, which belong to the technical field of the rapid determination of the acid value of the plant oil. The chemically modified electrode is a platinum electrode modified by perchlorate ion-doped polypyrrole. Electro-polymerization is carried at an electrochemical working station by adopting constant potential and circular scanning technology, so that a perchlorate ion-doped pyrrole polymer is formed on the surface of the platinum electrode. Pyrrole monomers are polymerized on the electrode by an electro-chemical method and doped with ions at the same time to ensure that the electrode has a catalytic effect on a reduction reaction of unsaturated fatty acids and conducts a current of the reaction simultaneously, so that the acid value of the plant oil can be calculated according to the value of the current. The modified platinum electrode prepared by the electro-polymerization by adopting the constant potential and circular scanning technology has high stability and high repeatability; and when the method is used for determining the acid value of the plant oil, the color and luster or the turbidity of an oil sample exert no interference with the determination of a voltammetric current, the required amount of the oil sample is relatively small, and the sensitivity and the accuracy are superior to those of the traditional titration and the potentiometric titration.

Description

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AI Technical Summary

Benefits of technology

This innovative modification technique allows for stable and repetitive use of improved catalyst materials made from Pt (platinum) metal plates that can be used during chemical reactions like oxidations. By controllably adjusting certain parameters such as voltage applied across different parts of the device, it becomes possible to achieve specific results on various types of samples containing organic acids at low concentrations without affecting their colors or fluorescent properties. These modifications also improve sensor performance over existing techniques while reducing its size.

Problems solved by technology

Technological Problem addressed by these technical problem discussed in this patent include improving the quality control of fried products during production processes due to factors like volatile substances, pH changes caused by temperature fluctuations, and impurities added through process steps. Current techniques involve analyzing only specific components while also requiring complex equipment and skilled operators who may lead to errors. Therefore, an improved method called ionosensitive field effect transistor (ISFT) gasochemistry detector (ICGID) solving these issues would provide better safety measures and faster testing times compared to existing technologies.

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