Minimizing chloride interferences produced by combination acid digestion using palladium and hydrogen as a matrix modifier in graphite furnace atomic absorption spectrometry

1992 ◽  
Vol 26 (1) ◽  
pp. 102-106 ◽  
Author(s):  
John Creed ◽  
Theodore Martin ◽  
Larry Lobring ◽  
James O'Dell
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Graphite Furnace ◽  
Absorption Spectrometry ◽  
Acid Digestion ◽  
Matrix Modifier ◽  
Graphite Furnace Atomic Absorption

scholarly journals Determination of Platinum in Wine by Graphite Furnace Atomic Absorption Spectrometry

1997 ◽  
Vol 80 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Carmen Cabrera-Vique ◽  
Pierra-Louis Teissedre ◽  
Marie-Thérèse Cabanis ◽  
Jean-Claude Cabanis
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Graphite Furnace ◽  
Standard Addition ◽  
Absorption Spectrometry ◽  
Acid Digestion ◽  
White Wines ◽  
Relative Standard ◽  
Graphite Furnace Atomic Absorption

Abstract A method based on graphite furnace atomic absorption spectrometry (GFAAS) was developed for determining platinum in wine. Wine samples were prepared by microwave acid digestion or dry mineralization. The method of standard addition was used for Pt determination in untreated wine samples and mineralized samples. Analyte modifiers and furnace conditions were optimized. Effects of cations (Mg2+, Ca2+, K+, Na+, and NH|) and anions (PO43, SO42) were tested separately and in combination. Analytical characteristics of the method were optimized for analyte recovery and signal enhancement. Recoveries ranged from 92.5 to 102%, and precision reproducibility relative standard deviation varied from 7.5 to 10%. Red, rosé, and white wines from France were analyzed. Platinum levels found in most wines were very low (<10 μg/L).

scholarly journals Determination of Lead in Croatian Wines by Graphite Furnace Atomic Absorption Spectrometry

2011 ◽  
Vol 62 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Blanka Tariba ◽  
Alica Pizent ◽  
Zorana Kljaković-Gašpić
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Graphite Furnace ◽  
Accurate Determination ◽  
Direct Determination ◽  
Absorption Spectrometry ◽  
White Wine ◽  
Matrix Modifier ◽  
Graphite Furnace Atomic Absorption

Determination of Lead in Croatian Wines by Graphite Furnace Atomic Absorption SpectrometryA method has been developed for direct determination of lead in wine by graphite furnace atomic absorption spectrometry (GFAAS) with Zeeman-effect background correction. The thermal behaviour of Pb during pyrolysis and atomisation stages was investigated without matrix modifier and in the presence of Pd(NO3)2, Pd(NO3)2+ Mg(NO3)2× 6H2O, and NH4H2PO4+ Mg(NO3)2× 6H2O as matrix modifiers. A simple 1:1 dilution of wine samples with Pd(NO3)2as a matrix modifier proved optimal for accurate determination of Pb in wine. Mean recoveries were 106 % for red and 114 % for white wine, and the detection limit was 3 μg L-1. Within-run precision of measurements for red and white wine was 2.1 % and 1.8 %, respectively. The proposed method was applied for analysis of 23 Croatian wines. Median Pb concentrations were 33 μg L-1, range (16 to 49) μg L-1in commercially available wines and 46 μg L-1, range (14 to 559) μg L-1in home-made wines. There were no statistically significant differences (P<0.05) in Pb concentration between commercial and home-made wines or between red and white wines.

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