Ion-exchange separation and spectrophotometric determination of trace amounts of niobium in silicate rocks

Mazzucotelli, A.; Frache, Roberto; Dadone, A.; Baffi, F.

doi:10.1039/an9770200825

Cited by 10 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ion exchange separation of Nb, or a group of elements including Nb from solid materials, can be undertaken using both cationic resins (Mazzucotelli et al 1977) and anionic resins, with particular reference to the analysis of alloys in conjunction with spectrophotometric methods (Westelen 1960, Dixon andHeadridge 1964). Rehkämper (1994) isolated Nb using a high-performance liquid chromatography (HPLC) determination in this way and it is his procedure for the separation of Nb that we use in the analytical scheme presented here.…”

Section: Ion Exchange Thin Film Proceduresmentioning

confidence: 99%

Precise Quantitative Determination of Niobium at Low Level Concentrations in Geological Samples by WD‐XRF

Étoubleau¹,

Cambon²,

Bougault³

et al. 1999

Geostandards Newsletter

View full text Add to dashboard Cite

We show in this paper that wavelength dispersive X‐ray fluorescence spectrometry (WD‐XRF) can provide high quality determinations (in terms of accuracy and precision) of Nb in rocks at low level concentrations comparable with data from much more sensitive analytical techniques. Two different sample preparation methods were investigated and combined with a long count time XRF strategy. We first developed a standard additions procedure for rock powders in conjunction with a careful evaluation of the position of analytical lines (peak and background). The precision (2s) varied from within 0.03 μg g−1 to 0.2 μg g−1 in the 0‐5 μg g−1 concentration range, and the detection limit was 0.2 μg g−1. We then separated Nb from the geological matrix using the chemical procedure described by Rehkämper (1994); after separation, Nb was collected on an anion‐exchange membrane which was directly excited by X‐rays. This method yielded a precision (2s) of 0.2 μg g−1 at the μg g−1 level if 100 mg of sample was used, the detection limit being dependent on the mass of sample studied. Detailed descriptions of analytical procedures are given, particularly of innovative aspects of Nb collection on membranes. XRF results obtained by the two sample preparation methods were compared with instrumental neutron activation (INAA) Ta analysis. We found that the ion‐exchange method tended to provide Nb concentrations which were about 10‐15% lower than concentrations found by the standard additions method. We report data for fifteen international reference materials (NIM‐N, AL‐I, AN‐G, BE‐N, MRG‐1, JA‐1, JB‐2, JB‐3, JA‐2, JF‐1, JGB‐1, BIR‐1, DNC‐1, W‐1, W‐2), for which our XRF results are in good agreement with literature data.

show abstract

Section: Ion Exchange Thin Film Proceduresmentioning

confidence: 99%

Precise Quantitative Determination of Niobium at Low Level Concentrations in Geological Samples by WD‐XRF

Étoubleau¹,

Cambon²,

Bougault³

et al. 1999

Geostandards Newsletter

View full text Add to dashboard Cite

show abstract

“…Multielement Separations. Schemes for the separation of metallic elements in silicate analysis by ion exchange continue to be developed (218,306,475). Separations on macroporous resins (224) and in the presence of tartaric (422) and triethylenetetramine hexaacetic acid (510) are reported.…”

Section: Books and Reviewsmentioning

confidence: 99%

Ion exchange and liquid column chromatography

Walton¹

1978

Anal. Chem.

View full text Add to dashboard Cite

High-pressure Eo-Alpine parageneses developed in magnesian metagabbros, Gruppo di Voltri, Western Liguria, Italy

Messiga

Piccardo

Ernst

1983

Contr. Mineral. and Petrol.

View full text Add to dashboard Cite

Ion-exchange separation and spectrophotometric determination of trace amounts of niobium in silicate rocks

Cited by 10 publications

References 0 publications

Precise Quantitative Determination of Niobium at Low Level Concentrations in Geological Samples by WD‐XRF

Precise Quantitative Determination of Niobium at Low Level Concentrations in Geological Samples by WD‐XRF

Ion exchange and liquid column chromatography

High-pressure Eo-Alpine parageneses developed in magnesian metagabbros, Gruppo di Voltri, Western Liguria, Italy

Contact Info

Product

Resources

About