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1998•Chinese Journal of Spectroscopy LaboratoryRequires access

Spectrophotometric Studies and Applications on the Reaction of Copper with PIF

Wang Dun-Qing

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Abstract

A highly sensitive color reaction of copper(Ⅱ) with piperonal fluorone (PIF) in the presence of CPB has been studied in detail.The results showed that copper(Ⅱ) with PIF forms 1∶2 blueviolet complex in a (CH 2) 6N HCl buffer medium of pH5.8-6.6.The absorptivity coefficient of the complex determined by dual wavelength spectrophotometry is 1.11×10 5L·mol -1 ·cm -1 .Beer's law is obeyed in the concentration range of 0-0.2μg·mL -1 for copper.The proposed method has been applied to the spectrophotometric determination of microamounts of copper in highly pure rare earth with the relative error and the relative standard deviation( n =6) of less than 3.7% and 2.0%,respectively.

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What this paper is about

A highly sensitive color reaction of copper(Ⅱ) with piperonal fluorone (PIF) in the presence of CPB has been studied in detail.The results showed that copper(Ⅱ) with PIF forms 1∶2 blueviolet complex in a (CH 2) 6N HCl buffer medium of pH5.8-6.6.The absorptivity coefficient of the complex determined by dual wavelength spectrophotometry is 1.11×10 5L·mol -1 ·cm -1 .Beer's law is obeyed in the concentration range of 0-0.2μg·mL -1 for copper.The proposed method has been applied to the spectrophotometric determination of microamounts of copper in highly pure rare earth with the relative error and the relative standard deviation( n =6) of less than 3.7% and 2.0%,respectively.

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Available abstract

A highly sensitive color reaction of copper(Ⅱ) with piperonal fluorone (PIF) in the presence of CPB has been studied in detail.The results showed that copper(Ⅱ) with PIF forms 1∶2 blueviolet complex in a (CH 2) 6N HCl buffer medium of pH5.8-6.6.The absorptivity coefficient of the complex determined by dual wavelength spectrophotometry is 1.11×10 5L·mol -1 ·cm -1 .Beer's law is obeyed in the concentration range of 0-0.2μg·mL -1 for copper.The proposed method has been applied to the spectrophotometric determination of microamounts of copper in highly pure rare earth with the relative error and the relative standard deviation( n =6) of less than 3.7% and 2.0%,respectively.

Key concepts: Molar absorptivity, Copper, Relative standard deviation, Spectrophotometry, Chemistry, Color reaction, Analytical Chemistry (journal), Nuclear chemistry

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