Concentration standard deviation of chlorophyll-a {chl-a CAS 479-61-8} per unit volume of the water body [particulate GF/F-5um phase] by filtration, acetone extraction and fluorometry chl-a_water_GF/F-5um_fluor_SD The square root of the average of the squares of deviations about the mean of a set of values of the specified measurement. 2019-06-12 12:30:31.0 SDN:P01::SCHLSDPM SDN:P01::SCHLSDPM SDN:P01::SCHLSDPM 1 1 2019-06-12 12:30:31.0 accepted false