| http://www.w3.org/ns/prov#value | - It is also understood that the aqueous medium and the aqueous liquid, respectively, may consist not only of the water-containing solvent but they may also contain a certain amount of dissolved substances, for example salts, to produce and maintain a suitable ionic strength in the liquid, or buffering substances to give a suitable pH. Examples of the former kind of substances are inorganic salts, s
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