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DOI: Determination Of Tungsten By Solid Phase Spectroscopy Using Immobilized Reagents
Rakhimov S.B. , National University Of Uzbekistan Named After Mirzo Ulugbek, Tashkent, Uzbekistan Khalilova L.M. , Navoi Pedagogical Institute, Navoi, Uzbekistan Zhumaeva E.Sh. , Navoi Pedagogical Institute, Navoi, Uzbekistan Gafurova D.A. , National University Of Uzbekistan Named After Mirzo Ulugbek, Tashkent, Uzbekistan Smanova Z.A. , National University Of Uzbekistan Named After Mirzo Ulugbek, Tashkent, UzbekistanAbstract
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 μg / ml. Sr does not exceed 9.0 ∙ 10-
2. The proposed technique has been tested on various types of waters.
Keywords
Immobilization,, , toxic metals
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