. . . . . . . . . . . . . . . . . . . "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 trichromatic spectrophotometry following the Jeffrey and Humphrey protocol and summation of size-fractionated values"@en . . . "SDN:P01::CPHLSSP6" . . . . "accepted"@en . "JHSpec_Chl-a_>GFF" . . . . "Sum of extracted chlorophyll measurements on each filter of a filter cascade down to a GF/F filter. Each measurement was a spectrophotometric assay of an acetone extract following the Jeffrey and Humphrey protocols."@en . . . . . . . .