. . . . . . . . . . . . . . . . "The estimated uncertainty or 'error' associated with the specified measurement. The method used to estimate uncertainty should be described in the usage metadata."@en . . . . "SDN:P01::CCH88377" . "accepted"@en . "Concentration uncertainty of chromium {Cr CAS 7440-47-3} per unit volume of rainwater [dissolved plus reactive particulate <0.4/0.45um phase]"@en . "Cr_rainwater<0.4/0.45_ERR" . . . .