Issue 39, 2014

A spectrophotometric study of Am(iii) complexation with nitrate in aqueous solution at elevated temperatures

Abstract

The complexation of americium(III) with nitrate was studied at temperatures from 10 to 85 °C in 1 M HNO3–HClO4 by spectrophotometry. The 1 : 1 complex species, AmNO32+, was identified and the stability constants were calculated from the absorption spectra recorded for titrations at several temperatures. Specific ion interaction theory (SIT) was used for ionic strength corrections to obtain the stability constants of AmNO32+ at infinite dilution and variable temperatures. The absorption spectra of Am(III) in diluted HClO4 were also reviewed, and the molar absorptivity of Am(III) at around 503 nm and 813 nm was re-calibrated by titrations with standardized DTPA solutions to determine the concentration of Am(III).

Graphical abstract: A spectrophotometric study of Am(iii) complexation with nitrate in aqueous solution at elevated temperatures

Article information

Article type
Paper
Submitted
22 Apr 2014
Accepted
13 Jun 2014
First published
23 Jun 2014

Dalton Trans., 2014,43, 14565-14569

Author version available

A spectrophotometric study of Am(III) complexation with nitrate in aqueous solution at elevated temperatures

G. Tian and D. K. Shuh, Dalton Trans., 2014, 43, 14565 DOI: 10.1039/C4DT01183J

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