GB/T 23977-2009Dyestuffs - Determination of content of salt - Conductance method (English PDF)

1 Scope

This standard specifies the method for determining the amount of the dye of salt with conductivity meter (as NaCl) of.

This standard applies to dye salinity (as NaCl) were measured.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent

Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research

Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

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)

Principle 3

Within a certain range of concentration, the salt content of the solution was positively correlated with the electrical conductivity, the higher the salinity, the greater the osmotic pressure of the solution, the conductivity is also more

Big. Dubbed a certain concentration of the dye solution or suspension, by measuring the electrical conductivity of the solution, you can calculate the salt content of the sample.

4 Equipment and Materials

Equipment and materials shall comply with GB/T 2374-2007 the provisions relating to equipment and materials; experimental water should comply with GB/T 6682-2008

The three water requirements.

a) conductivity meter.

b) analytical balance. a sense of the amount of 0.0001g.

c) volumetric flask. 100mL, 250mL, 500mL, 1000mL.

d) a single marking straw. 10mL, 20mL, 50mL.

e) Sodium chloride, analytical grade.

5 measurement method