Concentration of chlorophyll-a {chl-a CAS 479-61-8} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) chl-a_water>GF/F_HPLC The amount (mass or moles) of the specified pigment determined by HPLC assay of a sample collected by dissolution in acetone of the residue collected by GF/F filtration of a known volume of any water body. The quoted value either results from a single determination or the average of replicate determinations. 2015-07-29 12:34:02.0 SDN:P01::CPHLHPP1 SDN:P01::CPHLHPP1 SDN:P01::CPHLHPP1 6 6 2015-07-29 12:34:02.0 accepted false