Atomic absorption spectrometry (ASA) method for determination of cadmium and lead in plant material
1990
Jedrzejczak, R. | Szteke, B. (Instytut Biotechnologii Przemyslu Rolno-Spozywczego, Warszawa (Poland). Zaklad Analizy Zywnosci)
For decomposition of the organic substances in plant material wet mineralization was used with mixture of nitric acid, perchloric acid and sulphuric acid in volume proportions 6:2:0.25. The levels of cadmium and lead were determined in the organic phase after extraction with n-butyl acetate of the previously produced complexes with NaDDTK. The obtained limits of cadmium and lead detectability were 0.002 mg/kg and 0.02 mg/kg respectively. The recovery rate of the method ranged from 2.6 to 10.2 percent. The correctness of the evolved analytical procedure was confirmed by determination of the content of both elements in the NBS-SRM 1571 standard (orchard levels) and by participation in the international interlaboratory investigation of the Polish standard (dried cabbage leaves)
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