Alemasova N. The organic extracts as analytical forms at the extraction atomic absorption determination of metal traces

Object of research: extracts of Cd(II), Pb(II), Bi(III), Sb(III), Cr(VI) chelates with S,S- and N,O-donor organic ligands (pyrrolidinedithiocarbamate, diphenylcarbazide) and ion-pair of chloride acidic complexes of Cd(II), Sb(III,V), Bi(III) with tri-n-oktylammonium and brilliant green. Purpose of the research: to create a theoretical basis for the development of hyphenated extraction electrothermal atomic absorption methods of traces of light volatile, hydride and carbide forming elements determination in mineralized waters using chemical modifiers. Methods of research and apparatus: atomic absorption and atomic emission spectroscopy (Saturn-3); derivatography (OD-103; Q-1500D); chromatography-mass spectrometry (GC 8060/MD 800); X-ray analysis (DRON-3); titrimetry; photometric (КFК-3); thermodynamic modeling (Astra-4). Theoretical and practical results: Estimated forecast parameters for the evaluation of rational combination of organic extracts with ETAAS method were identified. A scheme of Cd, Pb, Sb, Bi, Cr free atoms formation from organic extracts were suggested. The hyphenated ETAAS techniques for determination forms of Sb(III,V), Bi(III), Cr(III,VI) in highly mineralized waters with improved metrological characteristics were developed. Novelty: A predictive parameter for selecting the optimal extractant and chemical modifier in hyphenated ETAAS method of analysis was suggested. The theoretical basis for the development of hyphenated ETAAS techniques of different antimony and chromium forms determination in mineralized waters was created. Degree of implementation: The technique of chromium determination in Ltd. "Skhidenergo" (Donetsk) was implemented. Field of the use: monitoring of environmental objects.