. . . . . . "SDN:P01::PHTLSDWC" . . . "Carbonate system parameter calculated from two of pCO2, DIC, TA and pH that have been directly measured in a sample collected from a water body."@en . . . "pH (total scale) standard deviation {pH[T]} of the water body by computation"@en . . . "pH(total)_SD_water_computed" . . "accepted"@en . . . . . . . . . . . . .