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Determination of vanadium by spectrophotometry with 2-(1,3,4-triazolylazo)-5-diethylamino-benzoicacid as a colour reagent

Liang Hua

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Abstract

The conditions of colour reaction of 2-(1,3,4-Triazolylazo)-5-Diethylamino-benzoic acid(TZDBA)with vanadium(V) are presented.The results show that the colour reagent reacts with vanadium,and forms a stable purple red complex in the medium of HCl with pH 2.0. The apparent molar absorptivity is 3 17×10 4L·mol -1 ·cm -1 ,and the maximum absorption wavelength is at 571 nm.Beer's law is obeyed in the range of 0～20 μ g/25ml for V(V).The method has been used for the direct determination of vanadium in a aluminium alloy sample and a synthetic water sample with satisfactory results.

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What this paper is about

The conditions of colour reaction of 2-(1,3,4-Triazolylazo)-5-Diethylamino-benzoic acid(TZDBA)with vanadium(V) are presented.The results show that the colour reagent reacts with vanadium,and forms a stable purple red complex in the medium of HCl with pH 2.0. The apparent molar absorptivity is 3 17×10 4L·mol -1 ·cm -1 ,and the maximum absorption wavelength is at 571 nm.Beer's law is obeyed in the range of 0～20 μ g/25ml for V(V).The method has been used for the direct determination of vanadium in a aluminium alloy sample and a synthetic water sample with satisfactory results.

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Available abstract

The conditions of colour reaction of 2-(1,3,4-Triazolylazo)-5-Diethylamino-benzoic acid(TZDBA)with vanadium(V) are presented.The results show that the colour reagent reacts with vanadium,and forms a stable purple red complex in the medium of HCl with pH 2.0. The apparent molar absorptivity is 3 17×10 4L·mol -1 ·cm -1 ,and the maximum absorption wavelength is at 571 nm.Beer's law is obeyed in the range of 0～20 μ g/25ml for V(V).The method has been used for the direct determination of vanadium in a aluminium alloy sample and a synthetic water sample with satisfactory results.

Key concepts: Molar absorptivity, Vanadium, Reagent, Spectrophotometry, Chemistry, Color reaction, Benzoic acid, Nuclear chemistry

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Determination of vanadium by spectrophotometry with 2-(1,3,4-triazolylazo)-5-diethylamino-benzoicacid as a colour reagent — Research Paper | ScholarLens