Gas Chromatography of Metals Chelates

Abstract

Aluminum (III), and chromium (III) were chelated with trifluoroacetylacetonate (TFA), determined by gas liquid chromatography (GLC) with electron capture detector (ECD), while iron (III) was treated similarly; but their chromatography suffered from several of practical difficulties. The technique was reliable for aluminum; although very sensitive was quite time consuming. Selenium was converted to the 4-chloropiazselenol and extracted into toluene for analysis. The Se (VI) was first reduced to Se (IV) by adding HCl and HBr with heating for more than 2 hours at 100 C. Estimation of selenium by gas liquid chromatography with ECD. The technique was sensitive allowing pictogram (10⁻¹² gm) amount of selenium to determined. The analysis of the sample (Drinking water at Tikrit city) was shown that the level of Al, Cr, Fe, Se in water below the detection limit of GLC with ECD.