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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 27, Number 11
BKCSDE 27(11)
November 20, 2006 

Sorption of Thiocyanate Silver Complexes and Determination of Silver by Diffuse Reflectance Spectroscopy
O. N. Kononova*, N. G. Goryaeva, T. V. Vorontsova, T. A. Bulavskaya, S. V. Kachin, A. G. Kholmogorov
Silver, Ion exchange, Thiocyanate complexes, Diffuse reflectance spectroscopy
The present paper is focused on sorption concentration of silver (I) on some complex-forming ion exchangers in the initial thiocyanate form and subsequent determination of Ag(I) in the phase of anion exchanger AN-25 by diffuse reflectance spectroscopy. The sorption and kinetic characteristics of the sorbents were investigated. The apparent stability constants of thiocyanate silver complexes in the ion exchanger phase were calculated. The sorption-spectroscopic method is proposed for Ag(I) determination in aqueous solutions. The calibration curve is linear in the concentration range of 10-200 mg/L (sample volume is 10.0 mL) and the detection limit is 2 μg/mL. The presence of Na+, K+, Mg2+ (macrocomponents) as well as of Ni (II), Co (II), Cu (II) do not hinder the determination of silver (I).
1832 - 1838
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