DETERMINATION OF MAJOR AND TRACE/TOXIC METALS IN COAL SAMPLES BY ATOMIC ABSORPTION SPECTROSCOPY AND NEUTRON ACTIVATION ANALYSIS

2002 ◽  
Vol 20 (1) ◽  
pp. 91-103 ◽  
Author(s):  
M. A. Rauf ◽  
M. Ikram ◽  
N. Ayub
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Toxic Metals ◽  
Atomic Absorption Spectroscopy

Determination of Al, P, and Si in fruit juices stored in glass and aluminized containers

1993 ◽  
Vol 71 (5) ◽  
pp. 769-770
Author(s):  
K. Soliman ◽  
L. Zikovsky ◽  
C. Dallaire
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Atomic Absorption ◽  
Atomic Absorption Spectroscopy ◽  
Fruit Juices ◽  
Plastic Coating ◽  
The Mean ◽  
Mean Concentration

The concentration of Al, P, and Si in 142 samples of five fruit juices, measured with neutron activation analysis and atomic absorption spectroscopy, varies from 0 to 1.44, 31 to 201, and 1.5 to 35 µg/mL, respectively. The mean concentration of Al in apple, grape, grapefruit, orange, and pineapple juices is 0.54, 0.94, 0.24, 0.29, and 0.62 µg/mL, respectively. The mean concentration of P in the same juices is 102, 115, 124, 127, and 76 µg/mL. The storage of juice in aluminized containers with internal plastic coating does not increase the concentration of Al in the juice.

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.

Sign in / Sign up

Export Citation Format

Share Document