Evaluation of dynamic ion exchanger for the isolation of metal ions for characterization by mass and .alpha.-spectrometry

Cassidy, R. M.; Miller, F. C.; Knight, C. H.; Roddick, J. C.; Sullivan, Robert W.

doi:10.1021/ac00298a027

Cited by 21 publications

(3 citation statements)

References 14 publications

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“…The development of efficient and specific chemical separations involving microchemical procedures has helped to lower the limit of measurement for many elements. The application of HPLC for elemental separations is another promising area for advances in IDMS analysis (18).…”

Section: Comparative Techniquesmentioning

confidence: 99%

Isotope dilution mass spectrometry for accurate elemental analysis

Fassett¹,

Paulsen²

1989

Anal. Chem.

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Section: Comparative Techniquesmentioning

confidence: 99%

Isotope dilution mass spectrometry for accurate elemental analysis

Fassett¹,

Paulsen²

1989

Anal. Chem.

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“…Various polymer- [6][7][8][9] or silica- [10][11][12][13][14] based cation exchangers have been used for high-performance ion-exchange chromatogra 7 phy (HPIEC) of rare-earth elements. Reversed-phase stationary phases have been used with eluents containing 1-octanesulfonate [18,19] or tetran-butylammonium hydroxide [20] as ion-pairing agents for ion-pair reversed-phase HPLC (IP-RP-HPLC). Reversed-phase stationary phases have been used with eluents containing 1-octanesulfonate [18,19] or tetran-butylammonium hydroxide [20] as ion-pairing agents for ion-pair reversed-phase HPLC (IP-RP-HPLC).…”

Section: Introductionmentioning

confidence: 99%

“…Complexing stationary phases synthesized by immobilization of chelators on the surface of siliceous or polymeric support materials have enabled the chromatographic analysis of rare-earth elements with improved selectivity [15][16][17]. Separated rare-earth elements are usually detected spectrophotometrically after postcolumn reaction with a color reagent such as arsenazo III [18,19], arsenazo I [7,11], 4-(2-pyridyl)azo resorcinol (PAR) [13,14], or chlorophosphonazo III [21]. Separated rare-earth elements are usually detected spectrophotometrically after postcolumn reaction with a color reagent such as arsenazo III [18,19], arsenazo I [7,11], 4-(2-pyridyl)azo resorcinol (PAR) [13,14], or chlorophosphonazo III [21].…”

Section: Introductionmentioning

confidence: 99%

Ion-exchange chromatography with an oxalic acid-α-hydroxyisobutyric acid eluent for the separation and quantitation of rare-earth elements in monazite and xenotime

1998

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Key WordsColumn liquid chromatography Ion-exchange Rare-earth elements Monazite Xenotime SummaryAn oxalic acid-c~-hydroxyisobutyric acid eluent has been used for the separation and determination of rareearth elements by high-performance ion-exchange chromatography. Fifteen rare-earth elements were separated within less than 25 rain on a 150 • 4.6 mm i.d. column packed with 5-1am sulfonic acid-bonded silica particles by elution with a combined gradient of 0.60-9.0 mM oxalic acid and 19.0-5.0 mM ot-hydroxyisobutyric acid at pH 4.6. Detection and quantitation of the separated rare-earth elements was accomplished by visibleabsorbance measurement at 600 nm after postcolumn reaction with arsenazo I. The gradient of the two complexing agents was optimized to enable the separation of yttrium(III) without interference from other elements, especially dysprosium(III) and terbium(III). Mass detection limits of the elements were in the range of 2-4 ng. Finally, the chromatographic system was applied to the quantitative analysis of rare-earth elements in monazite and xenotime.

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Detection of rare earth elements by post‐column reaction with xylenol orange and cetylpyridinium bromide

Hrdlička

Havel

Valiente

1992

J. High Resol. Chromatogr.

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SummaryRare earth elements have been separated by HPLC on octadecyl-bonded silica gel, dynamically modified with ammonium dodecylsulfate, using aqueous solutions of a-hydroxyisobutyric acid as mobile phase.The requirements and characteristics of post-column reaction with xylenol orange and cetylpyridinium bromide were investigated and optimized, and the reaction found to be highly sensitive and sufficiently rapid.The absorbance of the complex at 598 nm was not affected by the presence of a-hydroxyisobutyric acid at concentrations of the latter up to 150 mmol/l; at higher concentrations of the acid, the absorbance decreased slightly.For most of the rare earth elements the response was linear up to 0.2 mmol/l; the relative standard deviation of peak area was, typically, -1 %.The sensitivity of the method was usually better than 1 pg/ml.The results obtained from the determination of lanthanum, cerium, praseodymium, and neodymium in samples of apatite and bastnesite were in a good agreement with those obtained by ICP-AES. microbore cation-exchange column using an HIBA pH gradient, and monitored at 630 nm. The reaction conditions were not, however, studied and relatively high concentrations of XO (5 mmol/l) and CPB (10 mmol/l) in 20 % v/v methanol and concentrated ammonia buffer (pH 8.7) were used and values of molar absorptivities estimated from a chromatogram are rather low.Recently, a highly sensitive spectrophotometric method was proposed [8] Under optimum conditions (0.06 mmolil XO, 0 6 mmol/l CPB. and 0.01 moll1 acetate buffer, pH 4.5) the highest sensitivities were obtained at 610 nm; a t 600 nm the values of conditional molar absorptivities were between 80000 and 93000 mmol-'cm2 (detection limits 0.01-0.05 kg/ml) for all lanthanides.In this work, post-column derivatization of REE by reaction with XO and CPB has been studied and optimized. A sensitive method has been developed for the detection of REE after separation with HIBA solution on a dynamic ion exchanger.

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Evaluation of dynamic ion exchanger for the isolation of metal ions for characterization by mass and .alpha.-spectrometry

Cited by 21 publications

References 14 publications

Isotope dilution mass spectrometry for accurate elemental analysis

Isotope dilution mass spectrometry for accurate elemental analysis

Ion-exchange chromatography with an oxalic acid-α-hydroxyisobutyric acid eluent for the separation and quantitation of rare-earth elements in monazite and xenotime

Detection of rare earth elements by post‐column reaction with xylenol orange and cetylpyridinium bromide

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