research centers


Search results: Found 2

Listing 1 - 2 of 2
Sort by

Article
X-Ray Fluorescence Determination of Trace Elements in Vitamin-Mineral Complexes and Medicinal Herbs Using Chemically Modified Polyurethane Foam Sorbents

Authors: Alexander Chaplenko Alexander Chaplenko --- Oksana Monogarova Oksana Monogarova --- Kirill Oskolok Kirill Oskolok
Journal: Iraqi Journal of Pharmaceutical Sciences المجلة العراقية للعلوم الصيدلانية ISSN: 16833597 Year: 2018 Volume: 27 Issue: 2 Pages: 1-6
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

In this paper, we proposed the method of X-ray fluorescence (XRF) for the determination of some essential trace elements in medicinal herbs and vitamin-mineral complexes at the level of 1-10 g/ml. To increase sensitivity and selectivity of the determination, we followed simple and effective approach based on the extraction of metal ions from aqueous solutions with chemically modified polyurethane foam sorbents followed by direct XRF analysis. The conditions of sorption preconcentration of Co (II), Ni (II) and Zn(II) ions with modified sorbents were optimized. The proposed approach is used for the determination of trace elements in several kinds of medicinal herbs (coltsfoot leaves, nettle leaves and yarrow herb) and vitamin-mineral complexes (Alfavit, Vitrum and Multi-tabs).

In this paper, we proposed the method of X-ray fluorescence (XRF) for the determination of some essential trace elements in medicinal herbs and vitamin-mineral complexes at the level of 1-10 g/ml. To increase sensitivity and selectivity of the determination, we followed simple and effective approach based on the extraction of metal ions from aqueous solutions with chemically modified polyurethane foam sorbents followed by direct XRF analysis. The conditions of sorption preconcentration of Co (II), Ni (II) and Zn(II) ions with modified sorbents were optimized. The proposed approach is used for the determination of trace elements in several kinds of medicinal herbs (coltsfoot leaves, nettle leaves and yarrow herb) and vitamin-mineral complexes (Alfavit, Vitrum and Multi-tabs).


Article
Colorimetry and Indirect X-ray Fluorescence Determination of Active Ingredients in Tetracycline Hydrochloride Drug and Injection Solution of B12 Vitamin Using of Polyurethane Foam Sorbents

Loading...
Loading...
Abstract

The simple and available technique of colorimetry and indirect X-ray fluorescence determination of tetracycline hydrochloride (in the form of the colored complex with iron(III) ions) and cyanocobalamine (in the form of the colored thiocyanate complex with cobalt(II) ions) is offered. The analytes were separated from the accompanying components by sorption to polyurethane foam based on ethers. The conditions of sorption separation and measurement of the analytical signal of these substances are optimized. The obtained results of tetracycline drug and injection solution of the B12 vitamin are in satisfactory agreement with data declared by the manufacturer.

The simple and available technique of colorimetry and indirect X-ray fluorescence determination of tetracycline hydrochloride (in the form of the colored complex with iron(III) ions) and cyanocobalamine (in the form of the colored thiocyanate complex with cobalt(II) ions) is offered. The analytes were separated from the accompanying components by sorption to polyurethane foam based on ethers. The conditions of sorption separation and measurement of the analytical signal of these substances are optimized. The obtained results of tetracycline drug and injection solution of the B12 vitamin are in satisfactory agreement with data declared by the manufacturer.

Listing 1 - 2 of 2
Sort by
Narrow your search

Resource type

article (2)


Language

English (2)


Year
From To Submit

2018 (1)

2017 (1)