| http://www.w3.org/ns/prov#value | - M is a suitable cation selected from the group consisting of Na.sup.+, K.sup.+, 1/2Ca.sup.2+, 1/2Mg.sup.2+, or .sup.+NH.sub.jR.sub.k wherein j and k are independently from 0 to 4 and wherein j+k is 4 and R in this formula is any moiety capable
|
