scholarly journals Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory; determination of low-level silver by graphite furnace atomic absorption spectrophotometry

1993 ◽  
Author(s):  
D.L. Damrau
Keyword(s):  
Water Quality ◽  
Atomic Absorption ◽  
Graphite Furnace ◽  
Atomic Absorption Spectrophotometry ◽  
Low Level ◽  
Absorption Spectrophotometry ◽  
Graphite Furnace Atomic Absorption ◽  
The U.S ◽  
National Water

A sensitive high-temperature electrothermal atomic absorption analysis for Rb+ in erythrocytes and plasma of normal and hypertensive persons.

1985 ◽  
Vol 31 (2) ◽  
pp. 274-276 ◽  
Author(s):  
K F Hallis ◽  
N A Boon ◽  
C M Perkins ◽  
J K Aronson ◽  
D G Grahame-Smith
Keyword(s):  
Atomic Absorption ◽  
Healthy Subjects ◽  
Graphite Furnace ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Analysis ◽  
Healthy Individuals ◽  
Absorption Spectrophotometry ◽  
Graphite Furnace Atomic Absorption ◽  
The Matrix

Abstract This method for determination of Rb+ in human plasma and erythrocytes by graphite-furnace atomic absorption spectrophotometry has a sensitivity of 29 nmol/L for plasma, 12 nmol/L for erythrocytes. The detection limit is 24 nmol/L for plasma, 4.8 nmol/L for erythrocytes. This assay is approximately 30-fold more sensitive than previously reported techniques involving atomic absorption spectrophotometry, enabling use of smaller samples. The rubidium signal is linear with concentration up to 1.2 mumol/L, and addition of other cations to the matrix produces only minor alterations in the Rb+ signal. We measured plasma and erythrocytic Rb+ concentrations in healthy subjects and in patients with untreated essential hypertension. In both, our values are similar to those previously reported for healthy individuals.

scholarly journals Determination of Lead in Wine by Graphite Furnace Atomic Absorption Spectrophotometry: Interlaboratory Study

1997 ◽  
Vol 80 (6) ◽  
pp. 1287-1297 ◽  
Author(s):  
Paul A Brereton ◽  
Paul Robb ◽  
Christine M Sargent ◽  
Helen M Crews ◽  
Roger Wood ◽  
...  
Keyword(s):  
Atomic Absorption ◽  
Graphite Furnace ◽  
Atomic Absorption Spectrophotometry ◽  
Interlaboratory Study ◽  
Absorption Spectrophotometry ◽  
Target Values ◽  
Graphite Furnace Atomic Absorption ◽  
Standard Deviations ◽  
Test Materials

Abstract An interlaboratory study of a graphite furnace atomic absorption spectrophotometry (GFAAS) method for the determination of lead in wine was conducted. Seventeen laboratories from France, United States, and the United Kingdom, using a variety of GFAAS instruments, took part in the study. The method incorporated a novel matrix-matching procedure to minimize matrix effects between standards and samples. Six wine test materials were prepared and sent to participants as 12 blind duplicate or split level samples. There was good agreement between results obtained from participants and target values (24–279 μg/L) obtained with an inductively coupled plasma-mass spectrometry method. The precision of the GFAAS method was well within the range predicted by the Horwitz equation for the 6 test materials analyzed. Repeatability standard deviations ranged from 3 to 17%. Reproducibility standard deviations were in the range of 10 to 30%. The method is recommended for use for official purposes.

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