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Applied Sciences OPEN ACCESS

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, Uzbekistan
DOI Crossref DOI 10.37547/tajas/Volume02Issue09-35
tajas 2020
VOL. 2 / NO. 09 SEPTEMBER
FULL TEXT PP. 244-254
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VOLUME 2
ISSUE 09
YEAR 2020
PAGES 244-254
RESEARCH OVERVIEW

Abstract

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.

RESEARCH TOPICS

Keywords

Immobilization, , toxic metals

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