Concentration standard deviation of chlorophyll-a {chl-a CAS 479-61-8} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and fluorometry chl-a_water>GF/F_SD_fluor The square root of the average of the squares of deviations about the mean of a set of values of the specified measurement. 2018-10-15 17:05:31.0 SDN:P01::CLSDFLP1 SDN:P01::CLSDFLP1 SDN:P01::CLSDFLP1 4 4 2018-10-15 17:05:31.0 accepted false