New Standard from Last Update.

1. SCOPE

This standard provides guidelines to make dispersions from powder/liquid combinations. It provides procedures for:

a) Wetting a powder into a liquid;

b) Deagglomerating the wetted clumps;

c) Determining if solution composition can be adjusted to prevent reagglomeration;

d) Selecting dispersing agents to prevent reagglomeration; and

e) Evaluating the stability of the dispersion against reagglomeration.

This standard is applicable to particles ranging in size from approximately 0.05 µm to 100 µm. It provides a series of questions on the nature of the powder and liquid involved. The answers are used with charts that guide the user to generic dispersing agents that are likely to be suitable for dispersing the powder in the liquid. This standard applies only to the preparation of simple, dilute dispersions (less than 1 percent by volume of solids) for particle size analysis.

2. REFERENCES

The standards given below contain provisions, which through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of these standards:

IS 8883 Methods of sampling chemical and chemical product:

(Part 1) : 2005General requirements and precautions (first revision)

(Part 2) Sampling equipment,

(Sec 1) : 1978 For solids

(Sec 2) : 1978 For liquids

(Sec 3) : 1978 For gases