Molecular Activation Analysis and Its Application to Methylmercury Determination in Various Marine Samples

1976 ◽  
Vol 33 (6) ◽  
pp. 1324-1330 ◽  
Author(s):  
I. G. de Jong ◽  
D. R. Wiles
Keyword(s):  
Activation Analysis ◽  
Quantitative Estimation ◽  
Blood Analysis ◽  
Fish Protein ◽  
Molecular Identity ◽  
Nuclear Activation ◽  
Nuclear Activation Analysis ◽  
Gamma Radiolysis ◽  
Novel Method ◽  
The Common

A novel method is described by which nuclear activation analysis can be used to determine the chemical form in which certain elements occur. The radiochemical retention of molecular identity is constant for a given type of sample and can be easily determined. Application of this method for quantitative estimation of methylmercury in fish protein concentrates and in blood is described in detail and the results discussed. The results are reliable and reproducible. Radiochemical retention depends on the species of fish, perhaps because of gamma radiolysis of the sample. An alternative method is also described which, although less direct, is free from many of the common interferences, such as sodium and phosphorus. This method, also useful for blood analysis is appropriate for use at remote sampling stations.

Synthesis of Bromophenyl β-D-Glucuronides: Hydrophilic Precursors of Lipophilic Standards in the Analysis of Environmental Polychlorinated Biphenyls

2006 ◽  
Vol 71 (7) ◽  
pp. 1042-1050
Author(s):  
Manju Tandon ◽  
Piyush Kumar ◽  
Haiyan Xia ◽  
Lili Wang ◽  
Leonard I. Wiebe
Keyword(s):  
Activation Analysis ◽  
Polychlorinated Biphenyls ◽  
Internal Standard ◽  
Water Soluble ◽  
Extraction Techniques ◽  
Nuclear Activation ◽  
Nuclear Activation Analysis ◽  
Screening Protocol

A rapid PCB-screening protocol, based on a combination of extraction techniques and instrumental nuclear activation analysis (INAA), required water soluble brominated internal standard that undergoes facile hydrolysis to a lipophilic brominated counterpart. Bromophenyl glucuronic acids 2, 3, 7 were synthesized for this application. Glucuronic acids 2 and 3 were prepared by bromination of phenyl β-D-glucopyranosiduronic acid in 81 and 54%, respectively, whereas compound 7 was prepared by coupling methyl 2,3,4-tri-O-acetyl-α-D-glucopyranosyluronate bromide (5) with 2,4,6-tribromophenol. Incubation with β-glucuronidase indicated that tribromophenyl derivative 7 is an excellent substrate, with near quantitative conversion to tribromophenol within seconds of incubation with the enzyme.

92165021 New evidence that tamoxifen does not induce osteoporosis: A nuclear activation analysis and absorptiometry study

Maturitas ◽  
1992 ◽  
Vol 15 (3) ◽  
pp. 256
Author(s):  
J. Kalef-Ezra ◽  
D. Glaros ◽  
G. Klouvas ◽  
J. Hatzikonstantinou ◽  
A. Karantanas ◽  
...  
Keyword(s):  
Activation Analysis ◽  
Nuclear Activation ◽  
Nuclear Activation Analysis ◽  
New Evidence

New evidence that tamoxifen does not induce osteoporosis: a nuclear activation analysis and absorptiometry study

1992 ◽  
Vol 65 (773) ◽  
pp. 417-420 ◽  
Author(s):  
J. Kalef-Ezra ◽  
D. Glaros ◽  
G. Klouvas ◽  
J. Hatzikonstantinou ◽  
A. Karantanas ◽  
...  
Keyword(s):  
Activation Analysis ◽  
Nuclear Activation ◽  
Nuclear Activation Analysis ◽  
New Evidence
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