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Complex formation of ruthenium(IV) and osmium(VIII) with 1,10-phenanthroline on the surface of silica sorbents

✍ Scribed by T.I. Tikhomirova; V.I. Fadeeva; G.V. Kudryavtsev

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
625 KB
Volume
257
Category
Article
ISSN
0003-2670

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✦ Synopsis

A study was made of the sorption of ruthemum(IV) and osrmum(VIII) by sdlca and slhca with chemically grafted sulpho groups from solutions containing l,lO-phenanthrohne Usmg diffuse reflection, lummescence and x-ray photoelectron spectroscopic methods, it was found that durmg sorption at pH 6-7 and room temperature on the surface of silica sorbcnts phenanthrohnate complexes of various composition are formed, bls-and tns(l,lOphenanthrohne)metal (II, III), the Os(II) to O&II) mole ratlo bemg 2 1 A quantltatwe yield of tr&l,lOphenanthrolme)metal(II) complex IS obtamed at 98 f 2' C The rate of complex formation on the surface of the sorbents consIderably exceeds the rate of formatlon of the corresponding complexes m solution It P suggested that slhca sorbents have a catalytic action on the process of formation of complexes of ruthenium and osmmm with l,lO-phenanthrohne on the sorbent surface A rapId sorption-lummescenc method for determmmg ruthemum and osmmm IS proposed The detectlon lumt is 7 X 10e4 /Lg ml-' for ruthemum and 1 X 10e3 pg ml-' for osmnun

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