| http://www.w3.org/ns/prov#value | - Any convenient method for removing the water from the salt solution may be used, for example, evaporation, freezing, or electrolysis. [0026] The drying salts which may be used include the lithium salts such as lithium bromide and lithium chloride, calcium chloride, sodium sulfate, sodium chloride, sodium hydroxide or potassium hydroxide as well as other salts which have a strong affinity for water
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