Analysis of variation of algae and organic matter in raw water transformation using 3-D fluorescence spectroscopy

A kind of new technique,3-D fluorescence spectroscopy (TDFS),is used to analyse the phytoplankton of Shenzhen Dongjiang water source project.It is found that there are abundant algaes in the water through all the pipe line.The chlorophyll-a concentration is between 10.71 and 16.43 μ g/L,and the algae biomass vanges from 72.92 to 1 375×10⁴/L.TDFS can basically identify the species and quantity of algaes in water.There is distinct interconversion between fluorescence intension with chlorophyll-a concentration and the algal biomass.Furthermore,different kinds of dissolved organic matters and their concentration can be identified with TDFS method.