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.

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