. . . "PIGNA524" . "Light absorbance (524nm wavelength) by the suspended particulate material >GF/F [pigment phase] by filtration and spectrophotometry on residue before and after NaOCl bleaching and differencing of the measurements"@en . "22-JAN-09" . "accepted" . "1" . "PIGNA524" . "Unavailable" . "PIGNA524" . "SPMPigAbs524" . . "1" .