Spectrophotometric Determination of Lanthanum in Raffinate with Tribromoarsenazo

Xing Xin Chen; Kui Liu; Li Fang Kuang; Hua Long

doi:10.4028/www.scientific.net/AMM.675-677.1429

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 675-677Spectrophotometric Determination of Lanthanum in...

Spectrophotometric Determination of Lanthanum in Raffinate with Tribromoarsenazo

Abstract:

Determination of lanthanum in the raffinate by spectrophotometry was studied, using tribromoarsenazo as chromogenic reagent. The addition of ascorbic acid can mask the interference of other metal cations in the solution. Under the conditions of ascorbic acid (10g·L^-1) 5 mL, hydrochloric acid 0.04 mol·L^-1 and tribromoarsenazo (0.5g·L^-1) 2 mL, Beer’s law is obeyed in the range of 0-10 μg·(25mL)^-1 for lanthanum, with correlation coefficient higher than 0.99. Beer’s law can be applicable for the wavelength range of 580-660 nm. There is no linear relation at too high or too low acidic environment.

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Periodical:

Applied Mechanics and Materials (Volumes 675-677)

Pages:

1429-1432

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.675-677.1429

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Online since:

October 2014

Authors:

Xing Xin Chen, Kui Liu*, Li Fang Kuang, Hua Long

Keywords:

Acidity, Lanthanum, Spectrophotometry, Tribromoarsenazo, Wavelength

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