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Study on Color Reaction of 4-(2-Hydroxy-4- Nitrophenylazo)-1-Phenyl-3-Methylpyazolone with Thorium and Its Application

Ruan Qiong

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Abstract

The color reaction of 4 (2 hydroxy 4 nitrophenylazo) 1 phenyl 3 methylpyazolone (HNAPMP) with thorium (Ⅳ) was studied. In the HAc medium (pH 2～3), HNAPMP reacts with thorium (Ⅳ) to form a 2∶1 complex. The molar absorptivity is 4.96×10 4 L·mol -1 ·cm -1 at 540 nm. Beer's law is obeyed in the range of 0～2.8 mg/L for Th. The recovery of standard addition for Th is 97%～102% with precision of 1% RSD ( n =5). The method has been applied to the determination of Th in Th W alloy.

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What this paper is about

The color reaction of 4 (2 hydroxy 4 nitrophenylazo) 1 phenyl 3 methylpyazolone (HNAPMP) with thorium (Ⅳ) was studied. In the HAc medium (pH 2～3), HNAPMP reacts with thorium (Ⅳ) to form a 2∶1 complex. The molar absorptivity is 4.96×10 4 L·mol -1 ·cm -1 at 540 nm. Beer's law is obeyed in the range of 0～2.8 mg/L for Th. The recovery of standard addition for Th is 97%～102% with precision of 1% RSD ( n =5). The method has been applied to the determination of Th in Th W alloy.

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Available abstract

The color reaction of 4 (2 hydroxy 4 nitrophenylazo) 1 phenyl 3 methylpyazolone (HNAPMP) with thorium (Ⅳ) was studied. In the HAc medium (pH 2～3), HNAPMP reacts with thorium (Ⅳ) to form a 2∶1 complex. The molar absorptivity is 4.96×10 4 L·mol -1 ·cm -1 at 540 nm. Beer's law is obeyed in the range of 0～2.8 mg/L for Th. The recovery of standard addition for Th is 97%～102% with precision of 1% RSD ( n =5). The method has been applied to the determination of Th in Th W alloy.

Key concepts: Molar absorptivity, Thorium, Color reaction, Chemistry, Nuclear chemistry, Molar ratio, Materials science, Physical chemistry

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Study on Color Reaction of 4-(2-Hydroxy-4- Nitrophenylazo)-1-Phenyl-3-Methylpyazolone with Thorium and Its Application — Research Paper | ScholarLens