Laser desorption/ionization of complex metal compounds with ditizone

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Abstract

Complex compounds of Cu, Ag, Pd, Pt and Au with ditizone (diphenylthiocarbazone) have been studied by laser desorption/ionization activated by the surface of nanocrystalline silicon. All the studied complexes have been shown to be effectively ionized in the negative ion generation mode with the formation of molecular ions and one or more types of fragment ions. The limits of detection of metal ditizonates have been determined. The possibility of combining laser desorption/ionization with the droplet microextraction method for the determination of metals is investigated. The factors determining the concentration coefficient have been studied and optimal conditions for drip microextraction in the determination of gold have been found. The limit of gold detection was 5 pg/ml.

About the authors

А. S. Borodkov

Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of Sciences

Email: grechnikov@geokhi.ru
Russian Federation, Moscow

Ya. I. Simakina

Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of Sciences

Email: grechnikov@geokhi.ru
Russian Federation, Moscow

А. А. Grechnikov

Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of Sciences

Author for correspondence.
Email: grechnikov@geokhi.ru
Russian Federation, Moscow

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