Gas Chromatographic Determination of Trace Amount of Chromium

Abstract Trace amount of chromium was first converted quantitatively to volatile chromium chelates such as chromium(III) acetylacetonate, Cr(acac) 1 , chromium(III) trifluoracetylacetonate, Cr(tfa) 3 , and chromium(III) hexafluoroacetylacetonate, Cr(hfa) 3 , and the chelate solution was then analyzed by gas chromatography. It was found that Cr(tfa) 3 is the most suitable chemical form for this purpose. The method was profitably applied to the determination of chromium(III) incorporated in the six kinds of commerical products of potassium Chromate.