GB/T 2381-2013Dyestuffs and intermediate of dyestuffs - Determination of content of insoluble matters (English PDF)

1 Scope

This standard specifies the method for determination of the content of substances insoluble dyes and dye intermediates.

This standard applies to all types of water-soluble dyes, insoluble sulfur content of the test substance, color and color-based phenol and dye intermediates contained.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein

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

General conditions GB/T 2374-2007 Determination of dyes provisions

GB/T 6682-2008 analytical laboratory use specifications and test methods (ISO 3696. 1987, MOD)

GB/T 8170-2008 revised value represents about rules and limit values and judgment

Principle 3

The dye or dye intermediate fully dissolved in a suitable solvent and then filtered through a filter of a particular specification, fully washed with permanent

Determination of the amount of insoluble matter content.

4 Reagents and materials

Reagents and materials shall comply with the relevant provisions of GB/T 2374-2007 in Chapter 3. Test water should be consistent with GB/T 6682-2008

The three water requirements.

5. Apparatus

Instruments and equipment shall comply with the relevant provisions of GB/T 2374-2007 in Chapter 4.

6 Test methods