Pigment Ertraetion and Analysis Cell counts were carried out using a Neubauer Haemocytometer. Each count was repeated four times and average value was considered. An aliquot (5 mL) of D. salina cell suspension was centrifuged at 3000xg for 15 min. The pellet obtained was washed with distilled water and after removal of water by centrifugation again suspended in acetone and vortex mixed until a white precipitate appeared, which generally require min. The cell membrane gets ruptured because of organic solvent (acetone), thus extracting B-carotene along with chlorophyll. Acetone extract separated from cell debris by centrifuging it 3000xg for 10 min. Total carotenoid and chlorophyll levels were determined by UV/visible spectroscopy split beam spectrophotometer of samples in 80% acetone by using the equations of Carotene was assayed according to Ben-Amotz and Avron'''. E1% 1 cm of 2273 at 480 nm has been used to calculate f-carotene concentration.