Apparatus and method for water sorption measurement

摘要

An apparatus for sorption analysis includes a manifold, at least one sample cell to hold at least one sample under test, and a sorbable gas supply. At least one pressure measurement device is provided to monitor manifold pressure and sample cell pressure. A plurality of supply lines connect the at least one sample cell, the sorbable gas supply, the at least one vacuum supply, and the manifold. A plurality of isolation valves are connected within the plurality of supply lines. At least one isolation valve is connected between the at least one pressure measurement device and the manifold, and between the at least one pressure measurement device and the at least one sample cell. At least one vacuum supply evacuates the manifold, the at least one sample cell, the plurality of supply lines, the plurality of isolation valves, and the at least one pressure measurement device. The apparatus minimizes errors associated with sorption measurements on sample material at temperatures below the critical temperature of the sorbable gas supply.