Atomic ratio uncertainty of lead-206/lead-204 {206Pb/204Pb} in the water body [dissolved plus reactive particulate phase] 206Pb/204Pb_total_U The estimated uncertainty or 'error' associated with the specified measurement. The method used to estimate uncertainty should be described in the usage metadata. 2019-06-04 17:35:04.0 SDN:P01::ARPBXX04 SDN:P01::ARPBXX04 SDN:P01::ARPBXX04 5 5 2019-06-04 17:35:04.0 accepted false