2004•Journal of Hengyang Normal UniversityRequires access

Study on the Color Reaction of 4'-hydroxyl-3'-methoxy Phenylfluorone with Antimony(III) and its Analyticl Application

Zhi‐Min Chen

Abstract

The antimony(Ⅲ) reacts with 4'-hydroxyl-3'-methoxy Phenylfluorone(HMPF) to form a stable red complex in the presence of H_2S_2O_4 and dodecyldimethylbenzylammonium bromide(DDMBAB). The composition of the complex is Sb(Ⅲ) ∶HMPF =1∶3. The absorption maximum of the complex is at 534nm with apparent molar absorptivity of 4.62×104 L·mol~(-1)·cm~(-1). Beer's law is obeyed in the range of 0～0.96mg /L for antimony. The method has been applied to the direct determination of antimony in copper ores with satisfactory results.

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Key concepts: Antimony, Molar absorptivity, Color reaction, Copper, Chemistry, Bromide, Absorption (acoustics), Molar ratio