Voltammetric determination of trace elements in infusions of medicinal plants

• Para la determinación de elementos traza de importancia biológica (Cu, Zn, Cd, Pb) en hierbas de infusiones se estedió una voltamperometría de pulso diferencial de redisolución aniónica. El método de extracción llevado a cabo fue una combustión en atmósfera de oxígeno asistida por microondas.

• This work deals with the detn. of biol. important trace elements, such as copper, zinc, cadmium, and lead, in herbal infusions.  Black elder flowers (Sambuci flos), birch leaves (Betulae folium), linden flowers (Tiliae flos), peppermint (Menthae herba) and sage (Salviae herba) were used as plant material for the infusion prepns.  The method of differential pulse anodic stripping voltammetry was developed and applied for the detn. of the above mentioned trace elements in digests of plant materials as well as in herbal infusions.  The method of choice for digest prepn. was the microwave assisted combustion in an oxygen atm.  Parameters of voltammetric measurements were optimized.  The concns. of particular trace elements found in the digests; 36.6-226 μg.g^-1 for zinc, 3.78-6.96μg.g^-1 for copper, 1.59-0.39μg.g^-1 for lead and 0.208-0.106μg.g^-1 for cadmium were compared with concns. found in infusions: 32.7-1.86μg.g^-1 for zinc, 1.26-0.417μg.g^-1 for copper, 0.088-0.049μg.g^-1 for lead, and 0.076-0.021 μg.g^-1 for cadmium.  The ratios of the amts. for particular trace element transferred from plants into infusions ranged from 4% to 18%.
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• Sucman, E.; Matzke, F.
• Folia Veterinaria (2012), 56(3), 16-20