GB/T 34323-2017Carbon black - Determination of light transmittance of water dispersion - Spectrophotometer method (English PDF)

1 Scope

This standard specifies the visible light spectrophotometer method for the determination of light transmittance of carbon black aqueous dispersion.

This standard applies to coated super-water-dispersible carbon black.

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 3780.8 Carbon black Part 8. Determination of heating loss

GB/T 7044 pigment black

GB/T 8170 rounded repair rules and limit values of the representation and judgment

3 principle

The spectrophotometer emits a directional light through a dispersion with carbon black as the dispersed material (dispersed phase) and water as the dispersed medium (continuous phase) , A part of the light is reflected or scattered on the surface of the dispersion system and a part of the light is absorbed by the substance constituting the dispersion system and only a part of the light

Through Its transmittance quantitatively reflects the dispersion of carbon black in water.

4 reagent

Unless otherwise specified, only reagents identified as analytically pure and distilled or de-ionized water or rather pure water are used in the analysis.

5 instruments

6 samples