Comparison of Flameless Atomic Absorption Spectroscopy with Neutron Activation Analysis for Vanadium in Beach Asphalt

1975 ◽  
Vol 8 (4) ◽  
pp. 201-207 ◽  
Author(s):  
Lloyd A. May ◽  
B. J. Presley
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Flameless Atomic Absorption ◽  
Flameless Atomic Absorption Spectroscopy

Hopewell Obsidian Studies: Behavioral Implications of Recent Sourcing and Dating Research

1990 ◽  
Vol 55 (3) ◽  
pp. 461-479 ◽  
Author(s):  
James W. Hatch ◽  
Joseph W. Michels ◽  
Christopher M. Stevenson ◽  
Barry E. Scheetz ◽  
Richard A. Geidel
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Compositional Characterization

Specific questions regarding the antiquity of major midwestern Hopewell culture sites and their role in regional exchange systems are addressed in this paper through the dating (obsidian hydration) and compositional characterization (neutron activation analysis [NAA] and atomic absorption spectroscopy [AAS]) of obsidian artifacts. The analysis of 34 specimens from the Seip, Mound City, and Hopewell sites, Ohio, and the Naples site, Illinois, increases fivefold the number of chronometric dates available from these sites and expands the sample of compositionally identified specimens beyond those resulting from Griffin et al."s (1969) pioneering work. The resulting hydration dates support earlier estimates of the age of these contexts based on 14C or artifact seriation alone. The range of dates (78 B.C.-A.D. 347) and the compositional variety within the sample favors an expanded view of the nature of obsidian trade in the Midwest to include additional western sources, a longer episode of importation, and possible changes in the sources used through time.

scholarly journals Determination of trace aluminum concentration and homogeneity in biological reference material TORT-1 by instrumental neutron activation analysis and graphite furnace atomic absorption spectroscopy

1987 ◽  
Vol 65 (5) ◽  
pp. 1047-1050 ◽  
Author(s):  
Byron Kratochvil ◽  
Norine Motkosky ◽  
M. John M. Duke ◽  
Dennis Ng
Keyword(s):  
Neutron Activation Analysis ◽  
Instrumental Neutron Activation Analysis ◽  
Activation Analysis ◽  
Reference Material ◽  
Neutron Activation ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Graphite Furnace ◽  
Graphite Furnace Atomic Absorption

The biological reference material TORT-1, lobster hepatopancreas, was analyzed for aluminum by instrumental neutron activation analysis (INAA) and graphite furnace atomic absorption spectroscopy (GFAAS). After correction of the INAA results for interferences from 28Al produced by 31P(n,α)28Al and 28Si(n,p)28Al reactions, and use of HNO3 plus HF for sample dissolution for the GFAAS analyses, the methods gave similar results of 43 ± 3 and 42 ± 2 μg/g respectively for 200 to 300-mg test portions. Analysis of six portions from each of six bottles of TORT-1 showed no statistical difference at the 95% confidence level for the between and within bottle variances. Therefore, the material can be considered homogeneous for aluminum if 200- to 300-mg test portions are taken. The variance was greater and the average lower when 30-mg test portions were analyzed for aluminum by GFAAS. The pattern of the results, together with the need for HF in the dissolution procedure, suggests the presence of aluminum-containing microparticulate mineral matter, perhaps silicate material, in the material.

Determination of Trace Amounts of Mercury in Fish Tissues: Results of a North American Check Sample Study

1971 ◽  
Vol 54 (4) ◽  
pp. 866-869 ◽  
Author(s):  
J F Uthe ◽  
F A J Armstrong ◽  
K C Tam
Keyword(s):  
Neutron Activation ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Mercury Content ◽  
Check Sample ◽  
Flameless Atomic Absorption ◽  
Flameless Atomic Absorption Spectroscopy ◽  
Fish Samples ◽  
Flame Method

Abstract Three homogenized fish samples were distributed to 29 laboratories for analysis for mercury content. The majority (19) of the laboratories used acid digestion followed by atomic absorption analysis to measure the mercury content. Six laboratories used neutron activation; while 2 used dithizone methods and 2 used pyrolysis followed by flameless atomic absorption. Results from 4 laboratories were grossly aberrant or incomplete. Graphic analysis of the results on 2 samples showed that most laboratories tended to get either high or low results with both samples and that several had more consistent results with low fat samples than with high fat samples. Comparison of the combined results by flameless atomic absorption spectroscopy with those obtained by the flame method (t-test) showed that the latter gave just significantly lower results but much poorer precision. Differences between the combined results by flameless atomic absorption spectroscopy and those by neutron activation were probably insignificant.

scholarly journals Determination and evaluation of principal minerals in Negella sativa by atomic absorption technical methods

2011 ◽  
Vol 8 (1) ◽  
pp. 263-267
Author(s):  
Baghdad Science Journal
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Flame Atomic Absorption Spectroscopy ◽  
Flameless Atomic Absorption ◽  
Flame Atomic Absorption ◽  
Flameless Atomic Absorption Spectroscopy ◽  
Low Concentrations ◽  
Wet Ashing ◽  
High Concentrations

Determination and evaluation of principal minerals in Negella sativa by atomic absorption technical methods were showed, using wet ashing method. This work was done on Negella sativa because of wide using of this plant in many formulations ( in food or medicine ).two types of atomic absorptions were used : first, flame atomic absorption spectroscopy, for minerals of high concentrations such as, Na, Mg, K, Fe, Ca, Li, Ni, Zn, Mn, Cu. Second, flameless atomic absorption spectroscopy, for minerals of low concentrations such as, Al, Si, V, B, Pb, Co, Cd, Cr ,Si, Hg, Sn .The results showed the existence of many minerals in Negella sativa useful to human sanity with acceptable dietary allowance. On other side, the presence of harmful minerals to human sanity(Pb, Cd, Hg ) were negligible.

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