Comparative study of different heating systems used for chemical oxygen demand determination: microwave radiation and ultrasound energy

CANALS, A.; DOMINI, C.E.

Alicante -España

Workshop; COST D32: Workshop on Chemistry in High-Energy Microenvironments; 2004

Ultrasound and microwave activation in Analytical Chemistry at theUniversity of AlicanteC.E. Domini,a L. Vidal,b N. Kovachev,c V. Stefanova,c D. Georgieva,c V. Kmetovcand A. Canalsba Laboratorio FIA, Departamento de Química, Universidad Nacional del Sur,Bahía Blanca 800, Argentinab Departamento de Química Analítica, Nutrición y Bromatología, Universidad deAlicante, P.O. Box 99, E-03080, Alicante, Spainc Department of Analytical Chemistry, University of Plovdiv, 24 Tsar Assen St.,Plovdiv 4000, BulgariaOn this poster a broad perspective of all the research activities performed at theDepartment of Analytical Chemistry and Food Sciences of the University ofAlicante based on both microwave radiation and ultrasound energy will bepresented. These topics have been done in the near past or they are now understudy. Our research activities could be classified in two main areas: (i)microwave radiation vs. ultrasound energy (i.e., sample preparation) and; (ii)new applications of microwaves on Analytical Chemistry. Regarding the formertopic, new ultrasound assisted chemical oxygen demand methods have beensuggested [1,2] and faster and more environmentally friendly alternatives formetals extraction from soils, sewage sludges and sediments have been studiedand optimized [3,4]. In addition, ultrasound assisted total organic nitrogen andphosphorus are under study. Regarding the latter topic, some years ago ourgroup worked on aerosol generation (nebulization) and aerosol desolvation bothbased on microwave radiation absorption for atomic spectrometry [5,6].Currently, we are starting with a new topic devoted to apply microwave radiationfor thermal desorption of both organic and inorganic analytes beforechromatographic and spectroscopic analytical techniques.