J. Golimowski et B. Krasnodebskaostrega, VOLTAMMETRIC DETERMINATION OF HEAVY-METALS LEACHED FROM CERAMICS, Fresenius' journal of analytical chemistry, 361(1), 1998, pp. 65-68
Anodic stripping voltammetry using a mercury film electrode (MFE) and
hanging mercury drop electrode (HMDE) was applied for the determinatio
n of trace amounts of lead, cadmium, zinc and copper leached from plat
es by 4% acetic acid standard solution. The use of a MFE, the fast sca
n rate (1000 mV/s) by DC voltammetry with subtraction of background cu
rrent allowed to determine low concentrations of heavy metals. The amo
unts of metals leached from ware were Pb: 0.1 to 25, Cd: 0.015 to 0.44
, Zn: 0.07 to 1.06, Cu: 0.14 to 0.40 mu g/mL, depending on the kind of
plate and manufacture. Determinations of copper and zinc were carried
out using the HMDE electrode in the leachate, determination of tin af
ter medium exchange, and thallium after complexing of lead by EDTA. A
significant decrease of metals leached during the second leaching and
after washing with detergent solution was found for plates with overgl
aze decoration.