1. THE DEVELOPMENT OF ANALYTICAL METHODS FOR THE ELEMENTAL DETERMINATION OF BIOTIC INDICATORS PRESENT IN AQUATIC ECOSYSTEMS. Authors: EDINA BARANYAI, ISTVÁN FÁBIÁN, MILÁN FEHÉR, SÁNDOR HARANGI, PETRA HERMAN.2. METHOD DEVELOPMENT FOR THE ELEMENTAL ANALYSIS OF ORGANIC RICH SOIL SAMPLES BY MICROWAVE PLASMA ATOMIC EMISSION SPECTROMETRY . Authors: CSILLA NOÉMI TÓTH, SÁNDOR HARANGI, ANIKÓ KÁROLYI, ISTVÁN FÁBIÁN, EDINA BARANYAI.