Concentration standard deviation of lutein {CAS 127-40-2} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) lutein_water>GF/F_SD_HPLC 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::LUTNSDP1 SDN:P01::LUTNSDP1 SDN:P01::LUTNSDP1 4 4 2018-10-15 17:05:31.0 accepted false