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KMID : 1059519930370121053
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Journal of the Korean Chemical Society
1993 Volume.37 No. 12 p.1053 ~ p.1059
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Polarographic Determination of Iron(Ⅱ), Iron(Ⅲ) and Total Iron in the Presence of DTPA
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Sohn Se-Chul
Suh Moo-Yul
Eom Tae-Yoon
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Abstract
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The determination of iron(Ⅱ), iron(Ⅲ) and total iron was studied by differential-pulse and Tast polarography in 0.1 M acetate buffer solution at pH 4.60, Half wave potentials of iron(Ⅱ)-DTPA and iron(Ⅲ)-DTPA complexes were -0.150V vs. SCE reference electrode. In the presence of DTPA the redox process of iron(Ⅱ) and iron(Ⅲ) was reversible. Linear calibration plots were obtained for iron(Ⅱ) and iron(Ⅲ) concentration of 0.2∼1.0 mM. The detection limits of iron(Ⅱ) and iron(Ⅲ)by Tast polarographic method were 0.05 mM and 0.07 mM, respectively.
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