Measuring method for copper content in enamelled wires

Abstract

The invention discloses a measuring method for copper content in enamelled wires. The measuring method comprises the following steps of: (A) weighing an m g enamelled wire sample; (B) pouring alcohol in a beaker, fixing the sample above the beaker through a glass rod, and burning the sample to move paint on the surface of the enamelled wire; (C) putting the burnt enamelled wire in the beaker, adding nitric acid into the beaker, and heating the beaker to dissolve the enamelled wire; (D) transferring the solution in the beaker into a conical flask after the burnt enamelled wire is dissolved; and (E) titrating the solution in the conical flask to measure the copper content of the enamelled wire. Since copper wires in the enamelled wire and burnt and oxidized copper wires are heated and dissolved by the nitric acid and the concentration of copper ions in the solution is measured by titration so as to measure the copper content, the error caused by combustion and oxidization of the copper wires is eliminated, the copper content can be accurately measured, and the measurement error is small.

Description

technical field [0001] The invention relates to the technical field of enameled wires, in particular to a method for measuring the copper content of enameled wires. Background technique [0002] The existing method of measuring the copper content of enameled wire mainly adopts the enameled wire combustion weighing method. When the paint on the surface of the enameled wire burns, the copper wire inside the enameled wire is also burned and oxidized. Because the amount of copper oxidized by burning cannot be measured, resulting in the enameled wire There is a large gap between the measured value of the copper content and the actual value, resulting in poor measurement accuracy, large errors, and inaccurate measurement data. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a method for measuring the copper content of enameled wire with high measurement accuracy. [0004] I...

AI Technical Summary

Problems solved by technology

[0002] The existing measuring method of copper content of enameled wire mainly adopts enameled wire combustion weighing method to measure. When the paint on the surface of enameled wire burns, the copper wire inside the enameled wire is also burned and oxidized. Because the amount of copper oxidized by burning cannot be measured, resulting in the enameled wire There is a large gap between the measured value of the copper content and the actual value, resulting in poor measurement accuracy, large errors, and inaccurate measurement data