number_concentration_of_microplastic_in_sea_water m-3 [PCUM] "Number concentration" means the number of particles or other specified objects per unit volume. A microplastic is a synthetic polymer particle less than 5 mm in size, usually originating from the fragmentation of larger plastic debris.
Change Date: 4 Feb 2026, 1:03 p.m.
number_concentration_of_plastic_items_in_sea_water m-3 [PCUM] "Number concentration" means the number of particles or other specified objects per unit volume. A microplastic is a synthetic polymer particle less than 5 mm in size, usually originating from the fragmentation of larger plastic debris.
Change Date: 4 Feb 2026, 1:12 p.m.
number_concentration_of_plastic_items_in_sea_water m-3 [PCUM] "Number concentration" means the number of particles or other specified objects per unit volume. A plastic item is a synthetic polymer item, usually originating from the fragmentation of larger plastic debris.