Fast and direct screening of copper in micro-volumes of distilled alcoholic beverages by high-resolution continuum source graphite furnace atomic absorption spectrometry

作者：Ajtony Zsolt; Laczai Nikoletta; Dravecz Gabriella; Szoboszlai Norbert; Marosi Aron; Marlok Bence; Streli Christina; Bencs Laszlo^*

来源：Food Chemistry, 2016, 213: 799-805.

DOI：10.1016/j.foodchem.2016.06.090

• Distilled alcoholic beverages
• Heavy metal content
• Rapid furnace program
• Calibration methods
• Electrothermal atomic absorption spectrometry
• Graphite furnace electrothermal vaporization

HR-CS-GFAAS methods were developed for the fast determination of Cu in domestic and commercially available Hungarian distilled alcoholic beverages (called palinka), 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 249.2146 nm), 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 1.5 min. The detection limit of the method is 0.03 mg/L. Calibration curves are linear up to 10-15 mg/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.

• 出版日期2016-12-15