Crucible Atomizers Open Up New Opportunities for the Atomic Absorption Analysis of Trace Elements in Solid Samples with the Use of Fractional Evaporation

• Published in: Moscow University chemistry bulletin Vol. 74; no. 3; pp. 111 - 115
• Main Authors: Oreshkin, V. N., Tsisin, G. I.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-05-2019; Springer Nature B.V
• Subjects: Absorption; Atomic absorption analysis; Atomizers; Atomizing; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Crucibles; Evaporation; High temperature; Thermal decomposition; Trace elements; fractional evaporation; crucible atomizers; electrothermal atomic absorption analysis
• ISSN: 0027-1314; 1935-0260
• DOI: 10.3103/S002713141903009X

The atomic absorption analysis of trace elements in natural solid samples with the use of an improved crucible atomizer with several condensation/evaporation zones is shown to be advantageous. A new approach to fractional preconcentration is proposed, including two stages of thermal decomposition (high-temperature and low-temperature) of solid sample components when elements are evaporated and their vapors are condensed in heated and unheated zones. This approach facilitates the efficient suppression of non-selective interferences and matrix effects. It also improves the metrological characteristics of the element analysis of samples of complex composition.