Verification of applicability of mercury meniscus modified silver solid amalgam electrode for determination of heavy metals in plant matrices

The study is focused on the silver solid amalgam electrode modified by mercury meniscus (m-AgSAE). After its successful application for determination of heavy metals by differential pulse anodic stripping voltammetry (DPASV) in aqueous solutions, its use in more complicated matrices has followed. Four different reference materials of plant origin were used - White Cabbage, Rye Grass, Aubergine and Lucerne, and the obtained results of Cd, Cu and Ph contents were compared both with (certified) reference values and with results obtained by DPASV with HMDE and by AAS. Statistical evaluation confirmed good correlation between results of all three methods used and as well as with reference values.