GB/T 5550-2016Surface active agents - Determination of dispersing power (English PDF)

1 Scope

This standard specifies the method for the determination of the dispersibility of surfactants.

This standard is applicable to the determination of the dispersibility of anionic dispersants.

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.

GB/T 6372 Samples of Surfactants and Detergents

GB/T 6682 Analytical laboratory water specifications and test methods

3 principle

In the quantitative dispersant sample and standard solution, respectively, by adding quantitative fast pigment red 3RS solution, at the same stirring speed, a

Times to add a quantitative dilute sulfuric acid solution, so that fast pigments of trans-diazonium salt quickly into cis-diazonium salt, and with the phenolic ester into insoluble azo dye

The dispersion of the dispersion of the sample, in the closed conditions, the drip filter paper diffusion circle, compare the sample and the standard size of the circle area, to calculate the dispersant dispersion

Of the percentage.

4 reagents and materials