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Determination of bismuth in environmental samples by slurry sampling graphite furnace atomic absorption spectrometry using combined chemical modifiers
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Determination of bismuth in environmental samples by slurry sampling graphite furnace atomic absorption spectrometry using combined chemical modifiers
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Journal Article
Determination of bismuth in environmental samples by slurry sampling graphite furnace atomic absorption spectrometry using combined chemical modifiers
2015
Overview
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)₂was 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.
Publisher
Springer-Verlag,Springer International Publishing,Springer Nature B.V
Subject
/ Acids
/ analysis
/ Atmospheric Protection/Air Quality Control/Air Pollution
/ atomic absorption spectrometry
/ Atomic absorption spectroscopy
/ bismuth
/ carbides
/ Earth and Environmental Science
/ Ecology
/ Environmental Monitoring - methods
/ Environmental Pollutants - analysis
/ Environmental Pollutants - chemistry
/ Furnaces
/ Graphite
/ methods
/ Monitoring/Environmental Analysis
/ Nitrates
/ Sampling
/ Slurries
/ Soil
/ Spectrophotometry, Atomic - methods
/ Sulfur
/ Titanium
