Some Phenones and their Derivatives as Indicators for Volumetric Determination of Fe (III) with Diethylenetriamine Pentaacetic Acid

Abstract

2-Hydroxy-4-n-butoxyacetophenone, 2-hydroxy-4-n-butoxypropiophenone.
2-hydroxy-4-n-butoxy-5-nitroaeetophenone. 2-hydroxy-4-n-butoxy-5-nitropropiphenone.
2-hydroxy-4-n-butoxyacetophenone ethylenediamine and
2-hydroxy-4-n-butoxyacetophenone thiosemiearbazone have been used as
indicators for the direct diethylenetriamine pentaacetic acid (DTPA) titration
for Fe(lll). Fe(lll) can be quantitatively detetmined with an error of
measurement of  ≤±o.4% from solutions containing 280 ppm or more of
iron in the pH range 1.5-3.0,  A number of diverse ions can be tolerated
but Ca²⁺, Ba²⁺, Sr²⁺, Cu²⁺, Zn²⁺ phosphate,  tatlrate,  vanadate,  oxalate and
citrate interfered. The indicators can also he used for determination of iron
present in pharmaceuticals preparations.