Visual test determination of trace amounts of germanium in the form of an ionic associate of 12-molybdogermanate with astrafloxin

Tetiana Selivanova,Lyudmila Tsiganok,Andrey Vishnikin,S Semerikov,P Nechypurenko,H Danylchuk,S Chukharev,V Solovieva,O Bondarenko,S Sakhno,T Vakaliuk,A Striuk,V Osadchyi

doi:10.1051/e3sconf/202016601013

Visual test determination of trace amounts of germanium in the form of an ionic associate of 12-molybdogermanate with astrafloxin

Tetiana Selivanova, Lyudmila Tsiganok + Show 11 more

Open Access

https://doi.org/10.1051/e3sconf/202016601013

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Abstract

Sorption-colorimetric and naked eye determination of germanium as ion associates of GeMo O 4– with triphenylmethane dyes is described. The sorption of the ionic associates (IA) of 12molybdogermanat with astrafloxin (AF) on filter paper was studied. The colored scales for naked eye detection and dependence of chromaticity coordinates from the germanium (IV) concentration were obtained. The methods were applied to the determination of germanium (IV) in coked coal, iron ore, and in waters in the concentration range from 4•10–8 to 1•10–6 mol•L–1. The developed test-systems for the determination of Germanium in natural and technological objects were tested in the course of training students of chemistry of Kryvyi Rih State Pedagogical University.

Highlights

Control of the content of germanium is necessary when it is extracted from ores, concentrates, coal, in its production, in cosmetics and medicines, in food
Ionic associates (IA) of heteropolyanions (HPA) form solutions or pseudocolloidal solutions that allow the determination of heteroatom elements at a concentration level of 10–8–10–7 mol/L [3, 6]
We studied the optimal conditions for the formation of a colored ionic asociate (IA) of a 12-molybdogermanium complex (12-MGC) with polymethine dye cations astrafloxin (AF) in a solution and its sorption on cellulose paper

Summary

Introduction

Control of the content of germanium is necessary when it is extracted from ores, concentrates, coal, in its production, in cosmetics and medicines, in food. The main methods of separation are distillation or extraction of germanium chloride in a strongly acidic medium in the form of a complex with phenylfluorone or other reagents. It is relevant to develop highly sensitive, express methods for the determination of low contents of germanium (IV) and the creation of test methods for its semiquantitative determination.

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Conclusion