Filling Parameters of Magnetic Streptavidin Particles

1. Our % solids represent the % solids on a wt/wt basis due to the density of the magnetic microparticles and buffer solution. The density of the particle solution was determined to be 1.02 g/mL. The g/100mL is probably closer to 1.02 if the value is 1.00 g/100g 2. Our internal spec is 0.9 to 1.1 % solids. Some customers require 0.95 to 1.05. 3. The target fill for 100 ml bottles is 101-103 mL and is adjusted for density so the target weight would be 103g - 105g fill weight. 4. We typically overfill by about 1 to 4 mL range.