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2000•Chinese Journal of Spectroscopy LaboratoryRequires access

Determination of Iron(III) with the New Chromogenic Reagent 2-(H-Acidazo)-4,5-Dinitrophenol

Yin Guo

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Abstract

The color reaction of 2 (H acidazo) 4,5 dinitrophenol(HADNP) with iron(Ⅲ) was studied. In pH5.3 NaAc HAc buffer solution, HADNP can reacts with iron(Ⅲ) to form 3∶1 purpureal stable complex. The molar absorptivity is 1.7×10 4L·mol -1 ·cm -1 at 590nm. Beer's law is obeyed in the range of 0—1.0mg/L for iron (Ⅲ). This method can be applied to the determination of iron(Ⅲ) in tap water with satisfactory results.

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What this paper is about

The color reaction of 2 (H acidazo) 4,5 dinitrophenol(HADNP) with iron(Ⅲ) was studied. In pH5.3 NaAc HAc buffer solution, HADNP can reacts with iron(Ⅲ) to form 3∶1 purpureal stable complex. The molar absorptivity is 1.7×10 4L·mol -1 ·cm -1 at 590nm. Beer's law is obeyed in the range of 0—1.0mg/L for iron (Ⅲ). This method can be applied to the determination of iron(Ⅲ) in tap water with satisfactory results.

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Available abstract

The color reaction of 2 (H acidazo) 4,5 dinitrophenol(HADNP) with iron(Ⅲ) was studied. In pH5.3 NaAc HAc buffer solution, HADNP can reacts with iron(Ⅲ) to form 3∶1 purpureal stable complex. The molar absorptivity is 1.7×10 4L·mol -1 ·cm -1 at 590nm. Beer's law is obeyed in the range of 0—1.0mg/L for iron (Ⅲ). This method can be applied to the determination of iron(Ⅲ) in tap water with satisfactory results.

Key concepts: Chromogenic, Reagent, Molar absorptivity, Chemistry, 2,4-Dinitrophenol, Dinitrophenol, Tap water, Buffer solution

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