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Spectrophotometric Determination of Iron with 2-(5-Carboxy-1,3,4-Triazolylazo)-5-Diethylamino Aniline

Fu‐You Pan

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Abstract

Optimum conditions of color reaction of a new reagent 2-(5-carboxy-1,3,4-triazol-ylazo)-5-diethylamine(CTZAN) with iron(Ⅲ) was studied.The results showed that the CTZAN reacts with iron(Ⅲ) to form a 2:1 stable purple red complex in the buffer solution of HAc-NaAc with pH 6.0.The maximum absorption wavelength is at 570 nm.The apparent molar absorptivity is 2.08×104 L·mol-1·cm-1.Beer's law is obeyed in the range of 0.08-0.8 μg/mL for iron(Ⅲ).The method has been used for the direct determination of iron in aluminium alloys and pure aluminium.The results compare favourably with the certified values.

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Optimum conditions of color reaction of a new reagent 2-(5-carboxy-1,3,4-triazol-ylazo)-5-diethylamine(CTZAN) with iron(Ⅲ) was studied.The results showed that the CTZAN reacts with iron(Ⅲ) to form a 2:1 stable purple red complex in the buffer solution of HAc-NaAc with pH 6.0.The maximum absorption wavelength is at 570 nm.The apparent molar absorptivity is 2.08×104 L·mol-1·cm-1.Beer's law is obeyed in the range of 0.08-0.8 μg/mL for iron(Ⅲ).The method has been used for the direct determination of iron in aluminium alloys and pure aluminium.The results compare favourably with the certified values.

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Available abstract

Optimum conditions of color reaction of a new reagent 2-(5-carboxy-1,3,4-triazol-ylazo)-5-diethylamine(CTZAN) with iron(Ⅲ) was studied.The results showed that the CTZAN reacts with iron(Ⅲ) to form a 2:1 stable purple red complex in the buffer solution of HAc-NaAc with pH 6.0.The maximum absorption wavelength is at 570 nm.The apparent molar absorptivity is 2.08×104 L·mol-1·cm-1.Beer's law is obeyed in the range of 0.08-0.8 μg/mL for iron(Ⅲ).The method has been used for the direct determination of iron in aluminium alloys and pure aluminium.The results compare favourably with the certified values.

Key concepts: Molar absorptivity, Reagent, Color reaction, Aniline, Aluminium, Chemistry, Diethylamine, Absorption (acoustics)

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Spectrophotometric Determination of Iron with 2-(5-Carboxy-1,3,4-Triazolylazo)-5-Diethylamino Aniline — Research Paper | ScholarLens