144316-87-0Relevant articles and documents
A colorimetric method and reagent for the assay of lithium in a test sample
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, (2008/06/13)
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.