>my sme mali v skole napatovy standard nejaky elektrochemicky clanok, ktory >sa nesmel hrkat a 2 tyzdne pred meranim sa s nim nesmelo hybat aby sa >ustalil :-) Tzv. Westonuv clanek, vice treba na http://humboldt.edu/~scimus/Instruments/Elec-Duff/StdCellDuff.htm J. Hanzal