29May 2017

DERIVATIVE SPECTROPHOTOMETRIC DETERMINATION OF SOME RARE EARTH ELEMENTS IN EGYPTIAN MONAZITE.

  • Faculty of Science, Ain Shams University, Cairo, Egypt.
  • Nuclear Materials Authority, P.O. Box 530 El-Maadi, Cairo, Egypt.
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A sensitive and selective derivative spectrophotometric method is described for the determination of Samarium, Europium and Gadolinium with chrome azurol S and cetylpyridinium chloride (as a cationic surfactant) in concentrate rare earth oxide prepared from Egyptian monazite upgraded to about 97 % mineralogical grade. It was obtained from black sands deposited at Rosetta area on Mediterranean coast. Monazite is resulted as a byproduct during the recovery of the economic heavy minerals. The mineral monazite is composed of rare earth phosphatesalong with thorium and uranium. It contains 55-60% rare earth oxides. The calibration curve is linear between 0.5 and 12 μg ml-1 metal. The influence of various parameters and reaction conditions for maximum colour development was investigated. The standard deviations for determination are 0.208, 0.208 and 0.305, percentage errors 3.5, 4.9 and 5.1 %, for Samarium, Europium and Gadolinium respectively. The recommended method showed good sensitivity and selectivity.

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[Abd El-Rehim S. S, Mohammed A.A, El-Wakil A.F and Abd Al Aziz R.S. (2017); DERIVATIVE SPECTROPHOTOMETRIC DETERMINATION OF SOME RARE EARTH ELEMENTS IN EGYPTIAN MONAZITE. Int. J. of Adv. Res. 5 (May). 1632-1643] (ISSN 2320-5407). www.journalijar.com

Said sabet Abd El-Rehim, Abd Al Aziz Abd El-Warith Mohammed

DOI:

Article DOI: 10.21474/IJAR01/4292      
DOI URL: https://dx.doi.org/10.21474/IJAR01/4292

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