"Mass concentration means mass per unit volume and is used in the construction mass_concentration_of_X_in_Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'."@en . "SDN:P07::CF12N310" . "accepted"@en . . "" . . . . . "mass_concentration_of_phosphate_in_sea_water"@en . "1" . . . . "SDN:P07::CF12N310" . . . "SDN:P07::CF12N310" . "1" . "false" . "2009-07-06 15:41:29.0" . . "2009-07-06 15:41:29.0" . .