Spectrophotometric and inductively coupled plasma atomic emission spectrometric determination of titanium in ilmenites after rapid dissolution with phosphoric acid

The use of 85% phosphoric acid in borosilicate conical flasks for the dissolution of ilmenites at 230 ± 10°C is reported. The samples were quantitatively dissolved in less than 13 min. Titanium was determined by both spectrophotometry and inductively coupled plasma atomic emission spectrometry ICP-A...

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Bibliographic Details
Published in:Talanta (Oxford) 1997-02, Vol.44 (2), p.165-168
Main Authors: de Andrade, Jailson B., Nunes, Genebaldo S., Veiga, Merilio P., Costa, A.C.Spinola, Ferreira, Sergio L.C., Amorim, Adelaide M.M., Reis, Selma T.
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
Exact sciences and technology
Geochemistry
Geochemistry: general, methodology, regional studies
Ilmenites
Inductively coupled plasma atomic emission spectrometry
Phosphoric acid dissolution
Spectrophotometry
Titanium
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Summary:The use of 85% phosphoric acid in borosilicate conical flasks for the dissolution of ilmenites at 230 ± 10°C is reported. The samples were quantitatively dissolved in less than 13 min. Titanium was determined by both spectrophotometry and inductively coupled plasma atomic emission spectrometry ICP-AES. Vanadium and iron were determined by ICP-AES. In several samples of ilmenites analyzed, the TiO 2 concentration was in the range 10.6–57.5% and those of FeO and V 2O 5 were in the ranges 31.6–51.4% and 0.39–1.32%, respectively. In the spectrophotometric method, vanadium interference occurs only when the Ti V concentration ratio is
ISSN:0039-9140
1873-3573
DOI:10.1016/S0039-9140(96)02026-7