"Concentration of chlorophyll-a {chl-a CAS 479-61-8} per unit volume of the water body [particulate >0.8um phase] by filtration, acetone extraction and fluorometry"@en . . "SDN:P01::CPHLFLP8" . "Fluorometric assay of acetone extract from particulates collected on a 0.8um pore filter."@en . .