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Dual-Wavelength Spectrophotometric Determination on Colour Reaction of Rare Earths with CAP-MA

Bei Li

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Abstract

In the HCl medium of pH=1.0,rare earth forms colured complex with CPA-MA,and the molar absorptivity of the complex of dual-wavelength spectrophotometric determination is 1.3×10 5L·mol -1 ·cm -1 which is higher than the result of single-wavelength spectrophotometry.Beer's law is obeyed in the range of 0 to 20μg/25mL.This method is used directly for the determination of the trace rare earth in nodular cast ion,which has high sentivity,better selectivity and accuracy.The results are very satisfactory.

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What this paper is about

In the HCl medium of pH=1.0,rare earth forms colured complex with CPA-MA,and the molar absorptivity of the complex of dual-wavelength spectrophotometric determination is 1.3×10 5L·mol -1 ·cm -1 which is higher than the result of single-wavelength spectrophotometry.Beer's law is obeyed in the range of 0 to 20μg/25mL.This method is used directly for the determination of the trace rare earth in nodular cast ion,which has high sentivity,better selectivity and accuracy.The results are very satisfactory.

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Available abstract

In the HCl medium of pH=1.0,rare earth forms colured complex with CPA-MA,and the molar absorptivity of the complex of dual-wavelength spectrophotometric determination is 1.3×10 5L·mol -1 ·cm -1 which is higher than the result of single-wavelength spectrophotometry.Beer's law is obeyed in the range of 0 to 20μg/25mL.This method is used directly for the determination of the trace rare earth in nodular cast ion,which has high sentivity,better selectivity and accuracy.The results are very satisfactory.

Key concepts: Molar absorptivity, Spectrophotometry, Rare earth, Chemistry, Selectivity, Wavelength, Analytical Chemistry (journal), Color reaction

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