| http://www.w3.org/ns/prov#value | - Examples of suitable cations include alkali metal cations, such as Li+, Na+, and K+, alkaline earth metal cations, such as Mg2+ and Ca2+, nonpolymeric or monomeric ammonium and quaternary amine cations, including those of the general formula ##STR19## wherein each of R1, R2, R3, and R4, independently of the others, is a hydrogen atom, an alkyl group (including saturated, unsaturated, cyclic, and s
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