Patent ID: 7241623
Filing Date: 2007-07-10
Classification: G01N

Abstract:
1. A method of detecting soluble lithium in a liquid biological sample comprising combining: (a) an amount of the biological sample; (b) 2,3,7,8,12,13,17,18-octobromo-5,10,15,20-tetrakis(4-sulphonatophenyl) porphyrin; (c) alkali; (d) detergent; (e) chelating agent; and (f) optionally a suitable solvent; to produce a test sample having a pH of at least about 10; detecting absorbance change of the test sample relative to a lithium deficient standard sample at a wavelength of between about 475 nm and about 485 nm, between about 515 nm and about 525 nm or simultaneously between about 475 nm and about 485 nm and between about 515 nm and about 525 nm, wherein absorbance change indicates presence of soluble lithium in the biological sample; with the proviso that the method does not include removal of protein.