Hanks' Balanced Salt Solution (HBSS) is a buffer used to maintain a physiological pH for cells maintained in non-CO2 atmospheric conditions. Hank's balanced salt solution (HBSS) and Earl's balanced salt solution (EBSS) are isotonic solutions used to maintain osmolality and pH in biological applications. Both HBSS and EBSS may also include glucose and sodium bicarbonate for short-term maintenance of cells outside of the growth medium.