Content Handbook H

Outline of method

A suspension of known concentration in CIPAC Standard Water is prepared, placed in a prescribed measuring cylinder at a constant temperature, and allowed to remain undisturbed for a specified time. The top 9/10ths are drawn off and the remaining 1/10th is then assayed either chemically, gravimetrically, or by solvent extraction, and the suspensibility calculated (Note 1).
If the formulation (e.g. WP) is packed in water soluble bags, the suspensibility tests should be performed in presence of dissolved water soluble bag material.