- A colorimetric method and reagent for the assay of lithium in a test sample
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A chromogenic cryptand found to be especially selective in the determination of lithium in blood of the general formula (I): where:, n = 1 or 2,R1 and R2, same or different, are hydrogen, lower alkyl, lower alkenyl, or lower alkylidene; and, Q is a chromogenic moiety capable of providing a detectable response upon complexation of said compound with lithium ion and has the structure: wherein:, X is CH, C-OH or N; and, Z is p-nitrophenylazo, 2,4-dinitrophenylazo,2,4,6-trinitrophenylazo, p-nitrostyryl,p-benzoquinonemonoimino,bis-(4-dimethylaminophenyl) hydroxymethyl,3-phenylisothiazolyl-5-azo, thiazolyl-5-azo; or isothiazolyl-5-azo. A reagent composition and synthesis of a preferred chromogenic cryptand are also disclosed.
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- Novel Cryptand Chromoionophores for Determination of Lithium Ions
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The syntheses and chromogenic properties of three novel chromogenic (p-nitrophenyl)azo-labeled cryptands 1-3, having inward-facing phenolic groups, are described.Cryptand chromoionophore 1 has the smallest cavity of the three cryptands and exhibits total
- Zazulak, Wolodymyr,Chapoteau, Eddy,Czech, Bronislaw P.,Kumar, Anand
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p. 6720 - 6727
(2007/10/02)
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