On-line chromatographic separation and determination of chromium(III) and chromium(VI) with preconcentration of the chromium(III) using potassium hydrogen phthalate, in various samples by flame atomic absorption spectrometry

1996 ◽  
Vol 11 (11) ◽  
pp. 1067-1074 ◽  
Author(s):  
Attila Gáspár ◽  
József Posta ◽  
Róbert Tóth
Keyword(s):  
Flame Atomic Absorption Spectrometry ◽  
Chromatographic Separation ◽  
Absorption Spectrometry ◽  
Potassium Hydrogen Phthalate ◽  
Hydrogen Phthalate ◽  
Chromium Vi ◽  
Flame Atomic Absorption ◽  
Potassium Hydrogen ◽  
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scholarly journals A Novel Glass Fiber Coated with Sol–Gel Poly-Diphenylsiloxane Sorbent for the On-Line Determination of Toxic Metals Using Flow Injection Column Preconcentration Platform Coupled with Flame Atomic Absorption Spectrometry

Molecules ◽  
2020 ◽  
Vol 26 (1) ◽  
pp. 9
Author(s):  
Eleni Lazaridou ◽  
Abuzar Kabir ◽  
Kenneth G. Furton ◽  
Aristidis Anthemidis
Keyword(s):  
Complex Formation ◽  
Flame Atomic Absorption Spectrometry ◽  
Water Samples ◽  
Sol Gel ◽  
Absorption Spectrometry ◽  
Environmental Water ◽  
Chromium Vi ◽  
Flame Atomic Absorption ◽  
On Line

A novel simple and sensitive, time-based flow injection solid phase extraction system was developed for the automated determination of metals at low concentration. The potential of the proposed scheme, coupled with flame atomic absorption spectrometry (FAAS), was demonstrated for trace lead and chromium(VI) determination in environmental water samples. The method, which was based on a new sorptive extraction system, consisted of a microcolumn packed with glass fiber coated with sol–gel poly (diphenylsiloxane) (sol–gel PDPS), which is presented here for the first time. The analytical procedure involves the on-line chelate complex formation of target species with ammonium pyrrolidine dithiocarbamate (APDC), retention onto the hydrophobic sol–gel sorbent coated surface of glass fibers, and finally elution with methyl isobutyl ketone prior to atomization. All main chemical and hydrodynamic factors, which affect the complex formation, retention, and elution of the metal, were optimized thoroughly. Furthermore, the tolerance to potential interfering ions appearing in environmental samples was also explored. Enhancement factors of 215 and 70, detection limits (3 s) of 1.1 μg·L−1 and 1.2 μg·L−1, and relative standard deviations (RSD) of 3.0% (at 20.0 μg·L−1) and 3.2% (at 20.0 μg·L−1) were obtained for lead and chromium(VI), respec tively, for 120 s preconcentration time. The trueness of the developed method was estimated by analyzing certified reference materials and spiked environmental water samples.

On-line preconcentration system for flame atomic absorption spectrometry using unloaded polyurethane foam: determination of zinc in waters and biological materials

1999 ◽  
Vol 14 (11) ◽  
pp. 1749-1753 ◽  
Author(s):  
Ricardo Jorgensen Cassella ◽  
Denise Teixeira Bitencourt ◽  
Aline Garcia Branco ◽  
Sérgio Luis Costa Ferreira ◽  
Djane Santiago de Jesus ◽  
...  
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Polyurethane Foam ◽  
Flame Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Biological Materials ◽  
Flame Atomic Absorption ◽  
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