Determination Of Tungsten By Solid Phase Spectroscopy Using Immobilized Reagents
Rakhimov S.B.National University of Uzbekistan Named After Mirzo Ulugbek, Tashkent, UzbekistanK. M.Navoi Pedagogical Institute, Navoi, UzbekistanZhumaeva E.Sh.Navoi Pedagogical Institute, Navoi, UzbekistanGafurova D.A.National University of Uzbekistan Named After Mirzo Ulugbek, Tashkent, UzbekistanSmanova Z.A.National University of Uzbekistan Named After Mirzo Ulugbek, Tashkent, Uzbekistan
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A sorption-spectroscopic technique for the determination of tungsten by immobilized pyrocatechol violet and sodium salt of 1-(2-hydroxy -1-naphtho-azo) -2-naphthol-4-sulfonic acid has been developed. The optimal conditions for the determination of tungsten were selected and the conditions for immobilization on various types of sorbents (SMA-1, SMA-2, PPM-1, PPD-1, PPA-1) were optimized. The subordination of the tungsten complex with immobilized pyrocatechol violet Beer's law was studied. The calibration graph is linear in the concentration range 0.05-2.00 g / ml. Sr does not exceed 9.0 10-2. The proposed technique has been tested on various types of waters.
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