Title: Colour Reaction of 2-[2,3,5-triazolylazo]-5-Dimethylaninobenzoic Acid with Cobalt
Abstract: The condition for colour reaction of 2 [2,3,5 triazolylazo] 5 dimethylaninobenzoic acid (TZAMB) with cobalt was studied. The results showed that coblt reacted with TZAMB to form a stable blue complex at pH 8.02. The apparent molar absorptivity is 7.35×10 4 L·mol -1 ·cm -1 in aqueons ethanol solution at 609.4 nm.Beer′s law is obeyed in the range of 0~1.2 mg·L -1 for cobalt. The ratio of cobalt to TZAMB in the complex is 1∶3.The proposed method was applied to spectrophotometric determination of trace cobalt in vitamin B 12 injection and natural waters with satisfactory results.
Publication Year: 2000
Publication Date: 2000-01-01
Language: en
Type: article
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Cited By Count: 1
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