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2006•Journal of Analytical ScienceRequires access

Determination of Nickel by Spectrphotometry with 2-(2-Imidazolylazo)-5-Dimethylamino-benzoic Acid

GE Chang-hua

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Abstract

The colour reaction of a new reagent 2-(2-imidazolylazo)-5-dimethylamino-benzoic Acid(IZDBA) with Ni~(2+)were studied.The new reagent reacted with nickel(Ⅱ) to form a stable red complex with molar ratio of 1∶2 in the medium of HAc-NaAc at pH 6.0.The apparent molar absorptivity was(2.95)×10~(4)L·mol~(-1)·cm~(-1) and maximum absorption wavelength was at 580 nm.Beer's law was obeyed in the range of 0～0.8 μg/mL for Ni~(2+).The method has been used for the direct determination of nickel in aluminum alloy and nickel catalyst samples with satisfactory results.

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What this paper is about

The colour reaction of a new reagent 2-(2-imidazolylazo)-5-dimethylamino-benzoic Acid(IZDBA) with Ni~(2+)were studied.The new reagent reacted with nickel(Ⅱ) to form a stable red complex with molar ratio of 1∶2 in the medium of HAc-NaAc at pH 6.0.The apparent molar absorptivity was(2.95)×10~(4)L·mol~(-1)·cm~(-1) and maximum absorption wavelength was at 580 nm.Beer's law was obeyed in the range of 0～0.8 μg/mL for Ni~(2+).The method has been used for the direct determination of nickel in aluminum alloy and nickel catalyst samples with satisfactory results.

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Available abstract

The colour reaction of a new reagent 2-(2-imidazolylazo)-5-dimethylamino-benzoic Acid(IZDBA) with Ni~(2+)were studied.The new reagent reacted with nickel(Ⅱ) to form a stable red complex with molar ratio of 1∶2 in the medium of HAc-NaAc at pH 6.0.The apparent molar absorptivity was(2.95)×10~(4)L·mol~(-1)·cm~(-1) and maximum absorption wavelength was at 580 nm.Beer's law was obeyed in the range of 0～0.8 μg/mL for Ni~(2+).The method has been used for the direct determination of nickel in aluminum alloy and nickel catalyst samples with satisfactory results.

Key concepts: Chemistry, Molar absorptivity, Reagent, Nickel, Benzoic acid, Catalysis, Absorption (acoustics), Nuclear chemistry

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Determination of Nickel by Spectrphotometry with 2-(2-Imidazolylazo)-5-Dimethylamino-benzoic Acid — Research Paper | ScholarLens