Enameled wire organic volatile matter content detection method

Abstract

The invention provides a method for detecting the content of organic volatile matters in an enameled wire. The method comprises the following steps: S1, preparing a target organic volatile matter standard substance into mixed standard substance solutions with different concentrations; s2, taking one mixed standard substance solution, and injecting the mixed standard substance solution into a headspace sample injection bottle of a gas chromatography-mass spectrometer; s3, introducing the solution into a non-polar chromatographic column for separation; s4, the separated gas enters a mass spectrometer, a component table and a test method are established according to qualitative results, and then quantitative scanning is performed; s5, repeating the steps S2-S4 to test mixed standard solutions with other concentrations, and drawing an external standard method standard curve; and S6, adding ethanol into the enameled wire sample, putting the enameled wire sample into a headspace bottle, and testing the enameled wire sample according to the conditions of the steps S2 to S4 to obtain the content of each target organic volatile matter. The method has the advantages that ethanol is added into the enameled wire sample, so that the sample size can be kept stable, and the release amount of organic volatile matters is increased; due to the weak-polarity chromatographic column, the overall chromatographic retention time is shortened, and the detection speed is increased.

Description

technical field [0001] The invention belongs to the field of measuring the content of organic volatiles, in particular to a method for detecting the content of organic volatiles in enameled wires. Background technique [0002] As an indispensable electrical material in the process of electromagnetic energy conversion and signal transmission, enameled wire is widely used in coil windings of various electronic products such as motors, relays, transformers and their spare parts. Since enameled wires have special requirements for insulation performance, xylene, phenol, cresol and other solvents or thinners are usually used in the production of enameled wire insulation varnish. When the insulating varnish is applied on the conductor and evaporated and baked, a small amount of these organic compounds will still remain in the paint film of the enameled wire. [0003] For some closed electronic devices, such as relays, the winding group will slowly release organic gas after long-te...

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Problems solved by technology

[0005] Aiming at the problems of incomplete volatilization of organic gases in solids in the SN / T 2268-2009 method in the prior art, and poor repeatability due to the inability to effectively supplement gas when the headspace bottle extracts the gas, the present invention provides a detection method for the content of organic volatiles in enameled wires. method, the method has a short peak time and is easy to operate

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