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2008•Journal of Kunming University of Science and TechnologyRequires access

Spectrophotometric Determination of Rare Earth in Zn-Fe-RE Alloy with Chlorophosphonazo-III

Zhonglin Du

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Abstract

In the acid medium of pH=2-4,the absorbance at 680nm is measured by spectrophotometric analysis,using chlorophosphonazo-Ⅲ as chromogenic agent,and oxalic acid as masking agent to screen the interference of some metal ions.It is shown through the experimental results that the Lambert-Beer's law is well obeyed in the concentration range of 0-55μg/mL for rare earth.The recovery of standard addition shows that the method is accurate and reliable.

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What this paper is about

In the acid medium of pH=2-4,the absorbance at 680nm is measured by spectrophotometric analysis,using chlorophosphonazo-Ⅲ as chromogenic agent,and oxalic acid as masking agent to screen the interference of some metal ions.It is shown through the experimental results that the Lambert-Beer's law is well obeyed in the concentration range of 0-55μg/mL for rare earth.The recovery of standard addition shows that the method is accurate and reliable.

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Available abstract

In the acid medium of pH=2-4,the absorbance at 680nm is measured by spectrophotometric analysis,using chlorophosphonazo-Ⅲ as chromogenic agent,and oxalic acid as masking agent to screen the interference of some metal ions.It is shown through the experimental results that the Lambert-Beer's law is well obeyed in the concentration range of 0-55μg/mL for rare earth.The recovery of standard addition shows that the method is accurate and reliable.

Key concepts: Chromogenic, Masking agent, Absorbance, Oxalic acid, Chemistry, Spectrophotometry, Standard addition, Metal ions in aqueous solution

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