Application of hanging copper amalgam drop electrode for voltammetric determination of selenium content in fruiting bodies of selected mushrooms

作者：Piech Robert^*; Szlosarczyk Marek; Opoka Wlodzimierz; Paczosa Bator Beata; Bas Boguslaw; Krzek Jan; Muszynska Bozena

来源：International Journal of Environmental Analytical Chemistry, 2014, 94(3): 269-276.

DOI：10.1080/03067319.2013.840885

• hanging copper amalgam drop electrode
• cathodic stripping voltammetry
• edible mushrooms
• trace analysis
• selenium

A high-sensitivity method based on the CSV with the differential pulse step performed at the hanging copper amalgam drop electrode (HCADE) has been applied for selenium trace determination in selected mushrooms. The HCADE is characterised by simple handling, regeneration facility as well as very good repeatability and reproducibility of the surface. For synthetic solution LOD of Se(IV) as low as 0.25 nM (0.02 mu g center dot kg(-1)) at preconcentration time (120s) could be obtained with RSD=2.3% (n=5). The accuracy of the method was validated by analysis of certified reference materials (BCR 185R). Fruiting body caps of 12 selected macrofungi species from Basidiomycetes have been investigated. The selenium content determined in the dry matter of mushroom samples was equal to 0.49-11.7mg center dot kg(-1). The highest concentration of selenium was found in Boletus edulis and the lowest one in Laetiporus sulphureus on-plant growing pathogen.

• 出版日期2014-2-19