1 (http://linkinghub.elsevier.com/retrieve/pii/S0003267002010292 )   http://dx.doi.org/10.1016/S0003"2670(02)01029"2 )     !" # ! $  # % &$ % %##$ Alexandra Tsolakidou 1"2* , Jaume Buxeda i Garrigós 1 , Vassilis Kilikoglou 2 Analytica Chimica Acta, 474, 177"188 (2002) * Corresponding author. Tel. 0030"1"6503303; fax: 0030"1"6519430; e"mail: alexts@ims.demokritos.gr