Reagent for determining cations

Abstract

Abstract The invention is reagents and procedures for determining an amount of cations present in a sample, the reagent including one or more chromogenic cryptand compounds of formula I <IMAGE> (I) wherein k and j, either same or different, are equal to 1 to about 5; m and n, either same or different, are equal to 0 to about 4; a and e, either same or different, are equal to 0 to about 2; b and d, either same or different, are equal to 0 to about 5; R, either same or different, is hydrogen, lower alkyl, lower alkylidene, lower alkenyl, allyl, or aryl; and -Q- is <IMAGE> wherein X and CH, N, or COH; and Y includes <IMAGE> <IMAGE> <IMAGE> <IMAGE> <IMAGE> except that when Q is <IMAGE> wherein Y is p-nitrophenylazo, 3-phenylisothiazolyl-5-azo, isothiazolyl-5-azo, thiazolyl-5-azo, 2,4,6-trinitrophenylazo, p-nitrostyryl, p-benzoquinonemonoimino or bis-(p-dimethylaminophenyl)hydroxymethyl, then the following condition cannot be present: that simultaneously b is equal to 0 or 1, d is equal to 0 or 1, j is equal to 1, n is equal to 1 or 2, a is equal to 1, e is equal to 1, k is equal to 1 and m is equal to 2.

Inventors

• 👤 Eddy Chapoteau
• 👤 Bronislaw P. Czech
• 👤 Carl R. Gebauer
• 👤 Koon-Wah Leong
• 👤 Anand Kumar

Bibliographic Details