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STUDY ON THE COLOR REACTION OF THORIUM(VI) WITH THE NEW REAGENT 5-(2-HYDROXY-4,5-DINITROPHENYLAZO)-4-HYDROXY-2,7- NAPHTHALENE DISULFONIC ACID AND ITS APPLICATION

Dong Xue

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Abstract

It was found that thorium(Ⅵ) reacts with the new reagent, 5 (2 hydroxy 4,5 dinitrophenylazo) 4 hydroxy 2,7 naphthalene disulfonic acid (HADNP) in the presence of CPB and in an acetate buffer medium of pH 5.5 to form a stable reddish violet complex with its mole ratio Me∶R=1∶2. The molar absorptivity is found to be 1.23×10 5L·mol -1 ·cm -1 . Beer′s law is obeyed in the range of 0～30μg of Th(Ⅵ) per 25ml of solution. This method has been applied to the determination of thorium in water with satisfactory results.

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What this paper is about

It was found that thorium(Ⅵ) reacts with the new reagent, 5 (2 hydroxy 4,5 dinitrophenylazo) 4 hydroxy 2,7 naphthalene disulfonic acid (HADNP) in the presence of CPB and in an acetate buffer medium of pH 5.5 to form a stable reddish violet complex with its mole ratio Me∶R=1∶2. The molar absorptivity is found to be 1.23×10 5L·mol -1 ·cm -1 . Beer′s law is obeyed in the range of 0～30μg of Th(Ⅵ) per 25ml of solution. This method has been applied to the determination of thorium in water with satisfactory results.

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Available abstract

It was found that thorium(Ⅵ) reacts with the new reagent, 5 (2 hydroxy 4,5 dinitrophenylazo) 4 hydroxy 2,7 naphthalene disulfonic acid (HADNP) in the presence of CPB and in an acetate buffer medium of pH 5.5 to form a stable reddish violet complex with its mole ratio Me∶R=1∶2. The molar absorptivity is found to be 1.23×10 5L·mol -1 ·cm -1 . Beer′s law is obeyed in the range of 0～30μg of Th(Ⅵ) per 25ml of solution. This method has been applied to the determination of thorium in water with satisfactory results.

Key concepts: Reagent, Molar absorptivity, Chemistry, Thorium, Naphthalene, Molar ratio, Color reaction, Nuclear chemistry

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STUDY ON THE COLOR REACTION OF THORIUM(VI) WITH THE NEW REAGENT 5-(2-HYDROXY-4,5-DINITROPHENYLAZO)-4-HYDROXY-2,7- NAPHTHALENE DISULFONIC ACID AND ITS APPLICATION — Research Paper | ScholarLens