title: Fast and direct screening of copper in micro-volumes of distilled alcoholic beverages by high-resolution continuum source graphite furnace atomic absorption spectrometry.
abstract: HR-CS-GFAAS methods were developed for the fast determination of Cu in domestic and commercially available Hungarian distilled alcoholic beverages (called pálinka), in order to decide if their Cu content exceeds the permissible limit, as legislated by the WHO. Some microliters of samples were directly dispensed into the atomizer. Graphite furnace heating programs, effects/amounts of the Pd modifier, alternative wavelengths (e.g., Cu I 249.2146nm), external calibration and internal standardization methods were studied. Applying a fast graphite furnace heating program without any chemical modifier, the Cu content of a sample could be quantitated within 1.5min. The detection limit of the method is 0.03mg/L. Calibration curves are linear up to 10-15mg/L Cu. Spike-recoveries ranged from 89% to 119% with an average of 100.9±8.5%. Internal calibration could be applied with the assistance of Cr, Fe, and/or Rh standards. The accuracy of the GFAAS results was verified by TXRF analyses.
authors.affiliation: Department of Food Science, Széchenyi István University, H-9200 Mosonmagyaróvár, Lucsony utca 15-17, Hungary.
authors.forename: Zsolt
authors.initials: Z
authors.lastname: Ajtony
authors.affiliation: Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, P.O. Box 49, H-1525 Budapest, Hungary.
authors.forename: Nikoletta
authors.initials: N
authors.lastname: Laczai
authors.affiliation: Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, P.O. Box 49, H-1525 Budapest, Hungary.
authors.forename: Gabriella
authors.initials: G
authors.lastname: Dravecz
authors.affiliation: Laboratory of Environmental Chemistry and Bioanalytics, Department of Analytical Chemistry, Institute of Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest, Hungary.
authors.forename: Norbert
authors.initials: N
authors.lastname: Szoboszlai
authors.affiliation: Department of Food Science, Széchenyi István University, H-9200 Mosonmagyaróvár, Lucsony utca 15-17, Hungary.
authors.forename: Áron
authors.initials: Á
authors.lastname: Marosi
authors.affiliation: Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, P.O. Box 49, H-1525 Budapest, Hungary.
authors.forename: Bence
authors.initials: B
authors.lastname: Marlok
authors.affiliation: Atominstitut, Technical University of Wien, A-1020 Vienna, Stadionallee 2, Austria.
authors.forename: Christina
authors.initials: C
authors.lastname: Streli
authors.affiliation: Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, P.O. Box 49, H-1525 Budapest, Hungary. Electronic address: bencs.laszlo@wigner.mta.hu.
authors.forename: László
authors.initials: L
authors.lastname: Bencs
mesh_terms: D000434:Alcoholic Beverages / Q000032:analysis*; D002138:Calibration; D003300:Copper / Q000032:analysis*; D005504:Food Analysis; D006108:Graphite; D057230:Limit of Detection; D013054:Spectrophotometry, Atomic
chemical_list: D006108:Graphite; D003300:Copper
keywords: Calibration methods; Distilled alcoholic beverages; Electrothermal atomic absorption spectrometry; Graphite furnace electrothermal vaporization; Heavy metal content; Rapid furnace program