At each test interval, 3.75 mL of suspension from each bottle was pipetted into a separate 50-mL volumetric flask. About 25 mL of HPLCgrade water was added to each flask, and the flasks were ...

Methods Sample preparation 1.0 g of all samples was weighed, transferred to a 100 mL volumetric flask, diluted to volume with ethanol, followed by ultrasonication for 5 min and then filtered through ...