MT 188 - Determination of free parathion-methyl in CS formulations


Content Handbook L


Outline of method

A known amount of capsule suspension is mixed with a defined volume of an aqueous solution containing a non-ionic surfactant. The mixture is stirred for a defined period at a defined temperature. After two centrifugation steps the active ingredient content is determined in the supernatant.




The method is suitable for determining free parathion-methyl (up to 100 % free active ingredient relative to the total active ingredient content) in CS formulations up to 400 g/kg.