. . . . . . . . . . . . . . . . . . . . . . "LorSpec_Phae_GFF-5um" . . . . "accepted"@en . "Concentration of phaeopigments {pheopigments} per unit volume of the water body [particulate GF/F-5um phase] by filtration, acetone extraction and spectrophotometry and processing following the Lorenzen protocol"@en . . . . . . "SDN:P01::SPHASPPM" . "Spectrophotometric assay following the Lorenzen protocol of acetone extract from particulates on a GF/F filter filtering water previously filtered through a 5um pore filter."@en . .