MilliporeSigma
  • Home
  • Search Results
  • Determination of bismuth in environmental samples by slurry sampling graphite furnace atomic absorption spectrometry using combined chemical modifiers.

Determination of bismuth in environmental samples by slurry sampling graphite furnace atomic absorption spectrometry using combined chemical modifiers.

Environmental monitoring and assessment (2014-11-12)
Ryszard Dobrowolski, Joanna Dobrzyńska, Barbara Gawrońska
ABSTRACT

Slurry sampling graphite furnace atomic absorption spectrometry technique was applied for the determination of Bi in environmental samples. The study focused on the effect of Zr, Ti, Nb and W carbides, as permanent modifiers, on the Bi signal. Because of its highest thermal and chemical stability and ability to substantially increase Bi signal, NbC was chosen as the most effective modifier. The temperature programme applied for Bi determination was optimized based on the pyrolysis and atomization curves obtained for slurries prepared from certified reference materials (CRMs) of the soil and sediments. To overcome interferences caused by sulfur compounds, Ba(NO₃)₂ was used as a chemical modifier. Calibration was performed using the aqueous standard solutions. The analysis of the CRMs confirmed the reliability of the proposed analytical method. The characteristic mass for Bi was determined to be 16 pg with the detection limit of 50 ng/g for the optimized procedure at the 5% (w/v) slurry concentration.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Bismuth, granular, ≥99.99% trace metals basis
Sigma-Aldrich
Bismuth, powder, −100 mesh, ≥99.99% trace metals basis
Sigma-Aldrich
Bismuth, pieces, 1-12 mm, 99.999% trace metals basis
Sigma-Aldrich
Bismuth, shot, 4-30 mesh, 99.9% trace metals basis
Sigma-Aldrich
Bismuth, powder, −100 mesh, 99% trace metals basis
Sigma-Aldrich
Bismuth, beads, 1-5 mm, 99.999% trace metals basis
Bismuth, foil, not light tested, 50x50mm, thickness 0.02mm, permanent polyester support, 99.97%
Bismuth, foil, light tested, 25x25mm, thickness 0.015mm, permanent polyester support, 99.97%
Bismuth, foil, not light tested, 25x25mm, thickness 0.001mm, permanent polyester support, 99.97%
Bismuth, foil, not light tested, 25x25mm, thickness 0.02mm, permanent polyester support, 99.97%
Bismuth, foil, not light tested, 100x100mm, thickness 0.02mm, permanent polyester support, 99.97%
Bismuth, foil, not light tested, 100x100mm, thickness 0.05mm, permanent polyester support, 99.97%
Bismuth, foil, not light tested, 50x50mm, thickness 0.0025mm, permanent polyester support, 99.97%
Bismuth, foil, not light tested, 25x25mm, thickness 0.025mm, permanent polyester support, 99.97%
Bismuth, foil, light tested, 25x25mm, thickness 0.05mm, permanent polyester support, 99.97%
Bismuth, foil, 25x25mm, thickness 2.0mm, 100%
Bismuth, foil, light tested, 50x50mm, thickness 0.015mm, permanent polyester support, 99.97%
Bismuth, foil, not light tested, 150x150mm, thickness 0.05mm, permanent polyester support, 99.97%
Bismuth, foil, not light tested, 50x50mm, thickness 0.001mm, permanent polyester support, 99.97%
Bismuth, foil, light tested, 25x25mm, thickness 0.02mm, permanent polyester support, 99.97%
Bismuth, foil, light tested, 25x25mm, thickness 0.01mm, permanent polyester support, 99.97%
Bismuth, foil, not light tested, 25x25mm, thickness 0.0025mm, permanent polyester support, 99.97%
Bismuth, foil, 50x50mm, thickness 0.25mm, 100%
Bismuth, foil, not light tested, 50x50mm, thickness 0.005mm, permanent polyester support, 99.97%
Bismuth, foil, 25x25mm, thickness 1.0mm, 100%
Bismuth, foil, not light tested, 100x100mm, thickness 0.01mm, permanent polyester support, 99.97%
Bismuth, foil, 25x25mm, thickness 0.5mm, 100%
Bismuth, foil, not light tested, 50x50mm, thickness 0.05mm, permanent polyester support, 99.97%
Bismuth, foil, not light tested, 150x150mm, thickness 0.02mm, permanent polyester support, 99.97%
Bismuth, foil, 50x50mm, thickness 1.0mm, 99.97%