Facultade de Fisioterapia

Determination of chromium in steel by atomic absorption spectrometry using a direct chelate volatilization method

Authors: JR Castillo, JM Mir, Carlos Bendicho

Journal: Journal of Analytical Atomic Spectrometry , 4: 105-107, 02/1989

DOI: https://doi.org/10.1039/ja9890400105


The volatilisation of chromium as its acetylacetonate and subsequent atomisation in a silica tube, heated with an air-acetylene flame was used for the determination of chromium in steel. The proposed method gives a detection limit (DL) of 0.2 ng (DL =kσ/s) and the reproducibility, expressed as the relative standard deviation, is of the order of 4%. The conditions of chelate formation and the matrix effects were investigated. This method eliminates the interference effect produced by iron and acids on the chromium signal.