Determination of Cr(VI) in plants by electrothermal atomic absorption spectrometry after leaching with sodium carbonate

Results for the determination of Cr(VI) were confirmed by the analysis of BCR CRM 545 (Cr(VI) in welding dust) with good agreement between certified (39.5 ± 1.3 μg mg−1) and found (38.8 ± 1.2 μg mg−1) values. The total concentration of Cr in plants has also been determined by ET AAS after dry ashing of samples at 650 °C. Results were confirmed by the analysis of BCR CRM 281 (Trace elements in Rye Grass) with good agreement between the found (2.12 ± 0.16 μg g−1) and certified value (2.14 ± 0.12 μg g−1).