The outcome of a sperm preparation can be affected by an increased osmolality in the ejaculate. A simple way to minimize the increase of osmolality is by early dilution of the ejaculate. PureSpermBuffer is the perfect buffer to be used for this purpose.
Reference: Holmes, Björndahl, L., and Kvist, U. (2019). Possible factors influencing post‐ejaculatory changes of the osmolality of human semen in vitro. Andrologia, 51(11), e13443–n/a. https://doi.org/10.1111/and.13443