Drop Based Visual Fluorometry of Aluminium at ppb Level with 2, 2'-Dihydroxyazobenzene by Using Octadecylsilanized Silica Thin Layer
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A new visual fluorometry for trace aluminium has been developed. The method is based on specific immobilization of its chelate with 2,2′-dihydroxyazobenzene (H<SUB>2</SUB>L) on an octadecylsilanized silica thin layer. An aqueous sample drop was evaporated into a fleck on the water-repellent surface, and chromatography was performed with acetone. The fluorescent chelate, [AlL]<SUP>+</SUP>, remained at the spotting position, whereas the other chelates were eluted to a position close to the solvent front.
- Chemistry Letters
Chemistry Letters 1997(9), 895-896, 1997-09
The Chemical Society of Japan