期刊
ACTA PHARMACEUTICA
卷 58, 期 3, 页码 327-334出版社
HRVATSKO FARMACEUTSKO DRUSTOV (HFD)-CROATION PHARMACEUTICAL SOC
DOI: 10.2478/v10007-008-0013-4
关键词
iron; quercetin; morin; UV-spectrophotometry
Selective UV-spectrophotometric methods for determination of iron(III) in iron(II) samples have been developed. The methods are based on the interaction of Fe(III) with quercetin and morin, compounds of the flavonoid group. Redox reactions occurring between Fe(III) ions and the reagents used make the basis for the detection. Iron(II) does not react with quercetin and morin under the conditions applied [aqueous-methanolic (3:2) soluions, 0.3 mol L-1 HCl, 1.2 x 10(-4) mol L-1 quercetin (morin)] and does not interfere with the determination of Fe(III). Iron (III) can be determined up to 15 mu g mL(-1) using both the examined systems. The detection limits are 0.06 and 0.38 mg mL(-1) when using quercetin or morin, respectively. The method with quercetin was applied to the determination of Fe(III) (ca. 0.2%) in a Fe(II) pharmaceutical product.
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