Abstract
Sorption processes of noble metals on silica gel surface with covalently grafted N-(5-mercapto-1,3,4-thiadiazol-2-yl)-N'-propylurea groups (MTS) were studied. It was found that sorption onto MTS may occur via complexation and/or anion-exchange mechanisms depending on the acidity of the solutions. It was shown that differences in the kinetics and temperature conditions for the sorption of platinum and gold can be used to separate micro-amounts of these metals in solution.
References
1.
Beamish
F.E.
(1966 ) The Analytical Chemistry of the Noble Metals , Pergamon Press , Toronto, Canada .
2.
Lever
A.B.P.
(1984 ) Inorganic Electronic Spectroscopy , Elsevier Science Publishers , Toronto, Canada .
3.
Losev
V.N.
Kudrina
Yu.V.
Trokhimchuk
A.K.
(2003 ) Zh. Anal. Khim. 58 , 692 (in Russian).
4.
Losev
V.N.
Alennikova
Yu.V.
Elsuf'ev
E.V.
Trokhimchuk
A.K.
(2002 ) Zh. Anal. Khim. 57 , 721 (in Russian).
5.
Losev
V.N.
Elsuf'ev
E.V.
Buiko
E.V.
Trokhimchuk
A.K.
Andrianova
E.V.
(2004 ) Mendeleev Commun . 14 , 24 .
6.
Okabayashi
H.
Izawa
K.
Yamamoto
T.
Masuda
H.
Nishio
E.
O'Connor
C.J.
(2002 ) Colloid Polym. Sci. 280 , 135 .
7.
Stewart
J.J.P.
(1990 ) J. Comput. Aided Mol. Des. 4 , 1 .
8.
Tarasevich
Yu.I.
Trokhimchuk
A.K.
Legenchuk
A.V.
Ivanova
Z.G.
(2004 ) Kolloidn. Zh. 66 , 88 (in Russian).
9.
Trokhimchuk
A.K.
Andrianova
E.B.
Losev
V.N.
(2004 ) Adsorp. Sci. Technol. 22 , 837 .