University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Email: schalk@unf.edu
Website: @unf

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Cerium(3+)

  • IUPAC Name: cerium(3+)
  • Molecular Formula: Ce+3
  • CAS Registry Number: 18923-26-7
  • InChI: InChI=1S/Ce/q+3
  • InChI Key: XQTIWNLDFPPCIU-UHFFFAOYSA-N

@ ChemSpider@ NIST@ PubChem

Citations 5

"Simultaneous Spectrofluorimetric Determination Of Cerium(III) And Cerium(IV) By Flow Injection Analysis"
Anal. Chim. Acta 1986 Volume 179, Issue 1 Pages 469-473
Kamail H. Al-Sowdani and Alan Townsend

Abstract: Tervalent Ce is determined by injection of the sample into a stream of 0.5 M HCl, -HClO4 or -H2SO4 with monitoring of fluorescence at 350 nm (excitation at 260 nm). Rectilinear response is obtained for up to 100 ng mL-1 and the coefficient of variation for 40 ng is 0.6% (n = 10). For simultaneous determination of Ce(IV) (by difference) a zinc reductor is included in the system. By splitting the sample so that only a part is reduced, total Ce and Ce(III) are each determined. The mean coefficient of variation is 2.5%. Lanthanoids other than Tb and Yb do not interfere.
Fluorescence Interferences Sample splitting Speciation Simultaneous analysis

"Flow Injection Fluorimetric Determination Of Trimeprazine And Trifluoperazine In Pharmaceutical Preparations"
Talanta 1993 Volume 40, Issue 9 Pages 1361-1365
T. Pérez-Ruiz*, C. Martínez-Lozano, V. Tomás and C. Sidrach de Cardona,

Abstract: The flow injection system described is based on the oxidation of trimeprazine (I) and trifluoperazine (II) by Ce(IV) and the fluorimetric determination of Ce(III). Finely ground tablets were extracted by water with ultrasonic mixing and the resulting suspension was filtered. A 158 µL portion of the filtrate was injected into a stream (0.8 ml/min) of 1 mM Ce(IV) in 1 M H2SO4 at 30°C. After passing through the reaction coil (30 cm x 0.5 mm) the Ce(III) was detected fluorimetrically at 355 nm (excitation at 255 nm). The calibration graphs were rectilinear for 0.2-10 µM-I and II with RSD (n = 10) of 0.8-1.2% with a recovery of 96-104%. The sampling rate was 60 samples/h. The tolerance limits for various foreign substances are listed. Ascorbic acid, acetylsalicylic acid and Na2SO3 interfere.
Pharmaceutical Fluorescence Interferences Heated reaction

"Determination Of The Stoichiometry For Complexes By Flow Procedures. Molar Ratio And Asmus Methods"
Analyst 1986 Volume 111, Issue 11 Pages 1317-1320
J. Martinez Calatayud, P. Campíns Falcó and M. C. Pascual Martí

Abstract: Molar-ratio and Asmus methods for the determination of the stoichiometry of complexes were adapted to flow techniques. The procedures were tested for La(III)-Arsenazo I, Fe(II)-1,10-phenanthroline, Th(IV)-Thorin, Th(IV)-Alizarin S and Ce(III)-Arsenazo III. The method proposed is based on the merging of two solutions (metal and reagent), keeping the flow-rate of one of them constant and increasing the other stepwise. The graphs obtained and their theoretical basis are discussed.
Water Spectrophotometry Complexation Gradient technique Stoichiometry

"Fluorometric Determination Of A Trace Amount Of Cerium Based On The Teflon-tube Online Adsorption Concentration"
Bunseki Kagaku 1998 Volume 47, Issue 5 Pages 273-279
Arkin Iburaim, Masayuki Itagaki and Kunihiro Watanabe

Abstract: A flow injection analysis based on online adsorption concentration of a trace amount of Ce(III) onto an alkali-treated Teflon tube was studied. The determination limit of above analysis combined with fluorometry was 0.03 ppb. The maximum concentration value was obtained at pH 7-10, indicating that the adsorbed species were positive-charged. hydroxide. The adsorbed species were dissolved in 58 µL 1.5-M HCl to increase the detection intensity. In this study, 10 ppm Ce(III) was concentrated onto Teflon tube (inner diameter 0.5 mm, length 3.0 m) at pH 9.7, flow rate 1.0 mL/min, and concentration period 20 min to give adsorption amt. 1.5 mg/m2.
Fluorescence Preconcentration Tube wall immobilization

"Flow Injection Spectrophotometry Of Rare-earth Elements With A Porphyrin Reagent"
Lihua Jianyan, Huaxue Fence 1989 Volume 25, Issue 4 Pages 213-214
Tao, Z.;Ji, T.;Liu, S.

Abstract: A 20 µL aliquot of Nd standard or sample solution is transported to the reaction vessel with a carrier stream of 2.5 µg mL-1 of meso-tetrakis-(4-methoxy-3-sulfophenyl)porphine in 6 mM Na acetate (pH 6.5 to 7); the decrease in the reagent absorption peak at 420 nm is measured, with a detection time of 7 s for determination of Nd. Beer's law is obeyed for 0 to 8 ppm of Nd. In determination of Nd or other rare-earth elements (including La3+, Ce3+ and Pr3+), there is little or no interference.
Spectrophotometry Interferences Indirect