Fluid D is designed as a washing solution for sterility testing of pharmaceutical samples containing lecithin or oil using membrane filtration method.
After the samples containing lecithin or oil is filtered, the membrane should be rinsed with Fluid D for 3 times. The membrane can later be subjected for growth under appropriate medium.
Fluid A washing solution is used as a general rinse buffer and is compatible for samples containing lecithin or oil. Fluid A is used as a washing buffer for sterility testing of pharmaceutical products.
The appearance of the medium is clear and colorless to slightly yellowish.