5.1.3.After homogenising, the concentration of anionic and non-ionic surfactants in the detergent is determined according to the MBAS and BiAS analytical procedure. The soap content is determined by a suitable analytical method.U.K.
This analysis of the product is necessary to calculate the quantities required preparing fractions for the biodegradability tests.
Quantitative extraction is not necessary; however, at least 80 % of the non-ionic surfactants should be extracted. Usually, 90 % or more is obtained.
Principle