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Study on the spectrophotometric determination of Vanadium in alloy with 2-(2-Quinolylazo)-5-dimethylaminophenol

Qiang Zhou

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Abstract

The color reaction of 2-(2-quinolinylazo)-5-dimethylphenol (QADMAP) with vanadium(Ⅴ) was studied. In the presence of CTMAB and citric acid-sodium hydroxide buffer solution (pH 3.5) medium, QADMAP can react with vanadium(Ⅴ) to form a stable 2∶1 complex. The molar absorptivity of the complex is 1.12×10~5 L·mol~(-1)·cm~(-1) at 580 nm. Beer′s law is obeyed in the range of 0～0.6 μg/mL. This method can be applied to the determination of vanadium in alloy with good results.

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What this paper is about

The color reaction of 2-(2-quinolinylazo)-5-dimethylphenol (QADMAP) with vanadium(Ⅴ) was studied. In the presence of CTMAB and citric acid-sodium hydroxide buffer solution (pH 3.5) medium, QADMAP can react with vanadium(Ⅴ) to form a stable 2∶1 complex. The molar absorptivity of the complex is 1.12×10~5 L·mol~(-1)·cm~(-1) at 580 nm. Beer′s law is obeyed in the range of 0～0.6 μg/mL. This method can be applied to the determination of vanadium in alloy with good results.

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Available abstract

The color reaction of 2-(2-quinolinylazo)-5-dimethylphenol (QADMAP) with vanadium(Ⅴ) was studied. In the presence of CTMAB and citric acid-sodium hydroxide buffer solution (pH 3.5) medium, QADMAP can react with vanadium(Ⅴ) to form a stable 2∶1 complex. The molar absorptivity of the complex is 1.12×10~5 L·mol~(-1)·cm~(-1) at 580 nm. Beer′s law is obeyed in the range of 0～0.6 μg/mL. This method can be applied to the determination of vanadium in alloy with good results.

Key concepts: Chemistry, Vanadium, Molar absorptivity, Alloy, Sodium hydroxide, Citric acid, Spectrophotometry, Inorganic chemistry

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Study on the spectrophotometric determination of Vanadium in alloy with 2-(2-Quinolylazo)-5-dimethylaminophenol — Research Paper | ScholarLens