Title: Graphite filter-furnace with carbon thread atomizer and chemical modifiers for the electrothermal atomic absorption determination sn, pb, se and as in some of food, biological and environmentals

Biography:

Alexander Zacharia has completed his PhD at the age of 35 years from I.I.Mechnikov Odessa National University. He is the Director of Independent Analytical Chemistry Laboratory “CHEMTEST”, Member of Scientific Council (section on Analytical Chemistry) Ukrainian National Academy of Sciences , Member of Ukrainian Technical Committee TK122 –“ Gases, Liquid and Solids Analysis”. He is the Professor of Odessa National University. He has published more than 52 papers in reputed journals and has been serving as an editorial board member of repute.

Abstract

According IUPAC recommendation there are several techniques may be used to reduce or eliminate analytical errors resulting from several of interferences in atomic emission (AES) and atomic absorption spectrophotometry (AAS) analysis, including so called the buffer-addition technique. Wherein, in analytical practice of electrothermal (ET) atomic absorption spectrophotometry these spectrochemical buffers, that named as chemical modifiers, are added to both the sample and reference solutions for the purpose of making the measure of the analyte less sensitive to variations in interferent concentration. Additives that may serve in ET AAS analytical practice as spectrochemical buffers are: suppressors, releasers, protective agents, volatilizers. This work are devoted to investigation of analytical effect some of chemical modifiers: Pd(NO₃)₂, Mg(NO₃)₂, NH₄H₂PO₄ and their mixtures on the evaporation as well as atomization process for Ge, Sn, Sb and Bi at their direct ET AAS determination in some of materials with atomizer “graphite filter-furnace” (FF) and “carbon thread collector” (CTC)