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

Lin Xiuli

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Abstract

The conditions of color reaction of a new reagent 2-(5-carboxy-1,3,4-triazolylazo)-5-di-ethylamino-benzoicacid(CTZDBA)with iron(Ⅲ)was studied.The results showed that the CTZDBA reacts with iron(Ⅲ)to form a 2:1 stable purple red complex in the buffer solution of HAc-NaAc with pH 4.0.The maximum absorption wavelength is at 560 nm.The apparent molar absorptivity is 2.21×10 4 L·mol-1·cm-1.Beer's law is obeyed in the range of(0～0.8)mg/L for Fe(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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What this paper is about

The conditions of color reaction of a new reagent 2-(5-carboxy-1,3,4-triazolylazo)-5-di-ethylamino-benzoicacid(CTZDBA)with iron(Ⅲ)was studied.The results showed that the CTZDBA reacts with iron(Ⅲ)to form a 2:1 stable purple red complex in the buffer solution of HAc-NaAc with pH 4.0.The maximum absorption wavelength is at 560 nm.The apparent molar absorptivity is 2.21×10 4 L·mol-1·cm-1.Beer's law is obeyed in the range of(0～0.8)mg/L for Fe(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

The conditions of color reaction of a new reagent 2-(5-carboxy-1,3,4-triazolylazo)-5-di-ethylamino-benzoicacid(CTZDBA)with iron(Ⅲ)was studied.The results showed that the CTZDBA reacts with iron(Ⅲ)to form a 2:1 stable purple red complex in the buffer solution of HAc-NaAc with pH 4.0.The maximum absorption wavelength is at 560 nm.The apparent molar absorptivity is 2.21×10 4 L·mol-1·cm-1.Beer's law is obeyed in the range of(0～0.8)mg/L for Fe(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, Benzoic acid, Chemistry, Aluminium, Buffer solution, Absorption (acoustics)

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