Preconcentration of Iron in Some Drug and Water Samples by Coprecipitation with Magnesium Hydroxide Before Spectrophotometric Determination
Journal Title: Cumhuriyet Science journal - Year 2018, Vol 39, Issue 1
Abstract
A method was purposed for preconcentration and determination of iron, in this study. The method consist of these steps respectively: I) Coprecipitation of the iron present in the sample with Mg(OH)2 collector. II) Seperation of the precipitate by centrifuging. III) Solving the precipitation in acid. IV) UV-VIS spectrophotometric determination of the iron concentrated in the resultant lower volume solution using its complexation with thiocyanate. The effects of factors such as centrifugation time, pH and Mg concentration on the absorbance signal were investigated and the optimum values of these factors were determined. Total iron in the sample was brought single oxidation state (Fe(II) or Fe(III)) before coprecipitation procedure. Calibration curve was derived for both of the proceses. The detection limit and working range for the proposed method were found to be 0.01 mgL-1 and 0.03-0.3 mgL-1 respectively. The proposed method was applied to tap water, mineral water samples and Rennie anti-acid drug tablet. The accuracy of the method was tested by analyte spiked method. The accuracy results in terms of Recovery % are between 90-100%. Mostly the relative standart deviations (RSD %) values do not exceed 5%.
Authors and Affiliations
Cemalettin UYAN, Ersin BEKÇİOĞULLARI
Keywords
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- EP ID EP488495
- DOI 10.17776/csj.353455
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