Comparative determination of microelements in Baltic seawater and brown algae samples by atomic absorption spectrometric and inductively coupled plasma methodsTruus, Kalle; Viitak, Anu; Vaher, Merike; Muinasmaa, Urmas; Paasrand, Keddy; Tuvikene, Rando; Levandi, TuuliProceedings of the Estonian Academy of Sciences. Chemistry2007 / 3, p. 122-133 : ill