Saline solution is commonly used in the laboratory for sterilisation, cleaning, rinsing purposes etc. Saline solutions are also commonly used in cell biology, molecular biology, and biochemistry experiments and immunoassays.
Phosphate buffered saline solution or PBS buffer is the most commonly used solution as a buffer. It is a water-based salt solution containing sodium chloride, sodium phosphate,and can also contain potassium chloride and potassium phosphate. The buffer's phosphate groups help to maintain a constant pH and for biological purposes, the osmolarity and ion concentrations of the solution usually mimic those of the human body.
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