GB/T 34694-2017Plastic—Determination of residual chloride content of chlorinated poly (vinyl chloride)resins—Potentiometric titration method (English PDF)

1 Scope

This standard specifies the method of determination of residual chlorine content in chlorinated polyvinyl chloride resin.

This standard applies to chlorinated polyvinyl chloride resin.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 6682 analytical laboratory water specifications and test methods

GB/T 9725-2007 Chemical reagent potentiometric titration method

3 Terms and definitions

The following terms and definitions apply to this document.

4 principle

The sample is dissolved in an appropriate solvent, the prescribed electrode immersed in the same sample solution was measured, the titration process, the reference electrode potential

Remain constant, indicating the potential of the electrode changes with the concentration of the tested substance. Before and after the stoichiometry, the concentration of the measured substance in the solution

Changes will lead to dramatic changes in the electrode potential, electrode jump point indicates the end point of the titration.

5 reagent

6 equipment