Critical Investigation of the BCR Fractionation Method Using the BCR-701 Certified Material Sample
DOI:
https://doi.org/10.33038/jcegi.3499Keywords:
BCR extraction, HNO3/H2O2 microwave extraction, aqua regia microwave extraction, aqua regia extraction in reflux cooling extractor, ICP-OESAbstract
In our research, the fractionation performed with 3+1 step extraction recommended by the EU Community Bureau of Reference (BCR) in 1993, used to estimate the environmental risk caused by potentially toxic element pollution, was critically evaluated, using the previously optimized multi-element ICP-OES calibration for element detection. The main goal of our work is to compare the applicability of microwave extraction with HNO3/H2O2 mixture, as well as microwave extraction with aqua regia and extraction with a reflux cooling extractor with aqua regia in the determination of residual and pseudototal fractions. Based on the results of our tests, we found that both for the sum of the BCR1-4 fractions and for all the extractions, the concentrations are the highest in the case of the recirculation cooled aqua regia extraction, the microwave-assisted aqua regia and the microwave-assisted nitric acid/hydrogen peroxide extraction are almost equally effective. Therefore, the nitric acid/hydrogen peroxide microwave analysis can still be used, and is especially recommended in the event that aqua regia would cause an increase in the disturbing effect of the matrix during the measurement.
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