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Figure 12.4 A recommended standard design for a flow-through cell: the cell is cylindrical in shape and constructed of glass or other suitable material. A, an internal volume not exceeding 20 cm3 between barrier and filter. B, a bottom barrier of either a porous glass plate or a bed of 1 mm diameter glass beads designed to disperse flow and provide uniform distribution over the dosage chamber A. C, a suitable filter of approximately 25 mm diameter. D, fluid flow from bottom to top.

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