FILTER UNITS

摘要

PCT No. PCT/GB88/00700 Sec. 371 Date Feb. 26, 1990 Sec. 102(e) Date Feb. 26, 1990 PCT Filed Aug. 25, 1988 PCT Pub. No. WO89/01966 PCT Pub. Date Mar. 9, 1989.An assay filter unit where the filter of the unit is sealed into the body of the unit to prevent any passage of material to be assayed round the edge of the filter but is removable by breaking out a filter support grid along a predetermined line of weakness, together with the filter, for assay of material retained on the filter.