Graphite Furnace Atomic Absorption Spectrometric Determination of Iron, Cobalt, Nickel, and Copper at Parts-Per-Billion Level in High-Purity Lanthanum Fluoride

This paper describes an analytical method for the quantitation of iron, cobalt, nickel, and copper in lanthanum fluoride at trace levels with graphite furnace atomic absorption spectrometry (GFAAS) without using any matrix modifier. These metals were preconcentrated in HNO3 and analyzed directly. The detection limits for iron, cobalt, nickel, and copper were found to be 3, 1, 2, and 2 ppb, respectively. The average precision of measurements (°/o RSD) for all the elements was <10%.

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Determination of Iron, Cobalt, Nickel, and Copper in Hafnium Fluoride by GF-AAS

Applied Spectroscopy ◽

10.1366/0003702934048217 ◽

1993 ◽

Vol 47 (2) ◽

pp. 190-191 ◽

Cited By ~ 6

Author(s):

James Jaganathan ◽

Ishwar Aggarwal

Keyword(s):

Graphite Furnace ◽

Absorption Spectrometry ◽

Matrix Modifier ◽

Average Precision ◽

Iron Cobalt ◽

Cobalt Nickel ◽

Graphite Furnace Atomic Absorption ◽

Gf Aas ◽

Preconcentration Techniques

This paper describes an analytical method for the quantitation of iron, cobalt, nickel, and copper at trace levels with graphite furnace-atomic absorption spectrometry (GF-AAS) without the use of any matrix modifier or preconcentration techniques. A solution of HfF4 (10%, w/v) in HF (24%) was used for this study. The detection limits for iron, cobalt, nickel, and copper were found to be 3, 1, 3, and 2 ppb, respectively. The average precision of measurements (% RSD) for all the elements was <10%.

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

Archives of Industrial Hygiene and Toxicology ◽

10.2478/10004-1254-62-2011-2073 ◽

2011 ◽

Vol 62 (1) ◽

pp. 25-31 ◽

Cited By ~ 6

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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Graphite Furnace Atomic Absorption Method for the Determination of Chromium in Foods and Biological Materials

Journal of AOAC International ◽

10.1093/jaoac/75.2.354 ◽

1992 ◽

Vol 75 (2) ◽

pp. 354-359 ◽

Cited By ~ 3

Author(s):

N J . Miller Ihli ◽

F E Greene

Keyword(s):

Atomic Absorption ◽

Graphite Furnace ◽

Absorption Spectrometry ◽

Biological Materials ◽

Food Samples ◽

Magnesium Nitrate ◽

Matrix Modifier ◽

Graphite Furnace Atomic Absorption ◽

Characteristic Mass

Abstract A method was developed for the determination of chromium in food samples and other biological materials. Samples are dry ashed In a muffle furnace and are analyzed by graphite furnace atomic absorption spectrometry. Magnesium nitrate is used as a matrix modifier, and samples are quantltated by platform atomizatlon and peak area measurements with direct calibration against aqueous standards. The detection limit (based on 3.29 σ) was 5.6 pg, or 0.28 μg/L for a 20 μL injection. The characteristic mass was 3.2 pg. This method was validated by analyzing a range of reference materials and was subsequently used for the analysis of a variety of food samples. A comparison of analytical results obtained from direct calibration and method of additions was made.

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