PartTh234_>53um
Activity of thorium-234 {234Th} in the particulate material between the size fraction >53um suspended in a water body.
accepted
SDN:P01::A234TH02
Activity of thorium-234 {234Th CAS 15065-10-8} per unit volume of the water body [particulate >53um phase] by filtration and beta spectroscopy