The phosphate samples from the other stations sampled during the implementation study were measured without pH adjustment by manual spectrophotometry. ... The scanned images were then processed using software ( Scion lmage, Scioncorp) to generate the colour density in ... 6. RESULTS AND DISCUSSION The DGT fluxes, DET measured concentrations 30 Hanna Kaasalainen MERl No. 56, 2006.