ANNEX VIIITEST METHODS AND ANALYTICAL METHODS

3.Determination of non-ionic surfactants in biodegradation test liquors

3.2.Reagents and Equipment

3.2.10.

Standard acetate buffer: dissolve 40 g solid sodium hydroxide AR, in 500 ml water in a beaker and allow to cool. Add 120 ml glacial acetic acid (3.2.7). Mix thoroughly, cool and transfer to a 1 000 ml volumetric flask. Make up to the mark with water.