GB/T 33069-2016Determination of 1-vinyl-2-pyrrolidinone homopolymer for industrial use (English PDF)

1 Scope

This standard specifies the appearance, identification, K value, NVP residual monomer, moisture, solid content, pH value of industrial poly (N-vinylpyrrolidone)

Value and sulfate ash detection method.

This standard applies to N-vinyl pyrrolidone (hereinafter referred to as NVP) monomer by solution polymerization made of industrial poly N-vinyl

Pyrrolidone (hereinafter referred to as PVP) linear polymer.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article

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

Preparation of standard titration solution for GB/T 601 chemical reagents

Preparation of preparations and preparations for use in the test methods for chemical reagents GB/T 603

GB/T 6283 Determination of moisture content in chemical products Karl Fischer method (general method)

GB/T 6682 Analytical laboratory water specifications and test methods

General rules for the determination of pH value of chemical reagents GB/T 9724

3 reagent

Unless otherwise noted, the reagents used are analytical reagents, water are in line with GB/T 6682 provisions of the three water specifications, the standard used

Titration solution, preparation and products, according to GB/T 601, GB/T 603 provisions of the preparation, if the use of other levels of reagents, with its purity will not

Reduce the accuracy of the test shall prevail.

4 test method