scholarly journals Neutron Activation Analysis(NAA). III. NAA in environmental sciences. 1. Total organic halogens in the environment.

RADIOISOTOPES ◽  
1994 ◽  
Vol 43 (4) ◽  
pp. 228-232
Author(s):  
Masahide KAWANO ◽  
Ryo TATSUKAWA
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Environmental Sciences ◽  
Total Organic Halogens ◽  
Organic Halogens

Determination of extractable organic halogens in pine needles by neutron activation analysis

2004 ◽  
Vol 259 (1) ◽  
pp. 129-134
Author(s):  
Diandou Xu ◽  
Weike Zhong ◽  
Linlin Deng ◽  
Zhifang Chai ◽  
Xueying Mao ◽  
...  
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Pine Needles ◽  
Organic Halogens

scholarly journals Hybrid NAA for study of organic halogens in precipitation in Beijing, China

2011 ◽  
Vol 1 (1) ◽  
pp. 323-326
Author(s):  
Diandou Xu ◽  
Lingling Ma ◽  
Yang Chen ◽  
Zhifang Chai ◽  
Guofei Xu ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Polychlorinated Biphenyls ◽  
Organochlorinated Pesticides ◽  
Pcb Congeners ◽  
Organic Halogens ◽  
Beijing China ◽  
Historical Usage

Abstract The rainwater samples were collected from Beijing, China, from May 2006 to November 2007 and measured by a hybrid neutron activation analysis (NAA) method combining with gas chromatography (GC) for the concentrations and distribution of extractable persistent organic halogens (EPOX = EPOCl + EPOBr + EPOI), polychlorinated biphenyls (PCBs) and organochlorinated pesticides (OCPs). The average concentrations of EPOCl, EPOBr and EPOI in all the samples were 102, 0.18, and 0.31 μg/L, respectively. The relative proportions of the known organochlorines (84 PCB congeners + 10 OCPs) to total EPOCl were 0.03–1.44%, which implied that most of EPOCl measured in rainwater were unidentified. Significant correlations between the logarithms of the concentrations of EPOCl and EPOBr (r = 0.65, p < 0.0001) or EPOI (r = 0.72, p < 0.0001) and between the concentrations of EPOBr and EPOI (r = 0.79, p < 0.0001) were observed, which suggested that EPOCl, EPOBr and EPOI in rainwater might mainly come from the similar sources. There were no clear seasonal trends for the concentrations of EPOX. PCBs in rainwater were dominated by tetra-CB and tri-CB. The homologue was consistent with the technical PCB products in China, which indicated that PCBs in the environment mainly came from the historical usage of technical PCB products.

Investigation of cross sections of reactions used in neutron activation analysis

Kerntechnik ◽  
2011 ◽  
Vol 76 (2) ◽  
pp. 136-141 ◽  
Author(s):  
E. Tel ◽  
M. Şahan ◽  
F. A. Uğur ◽  
H. Şahan ◽  
A. Aydin
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Cross Sections

Trace Element Contents in Thyroid Cancer Investigated by Instrumental Neutron Activation Analysis

2018 ◽  
Vol 1 (1) ◽  
pp. 1-13
Keyword(s):  
Thyroid Cancer ◽  
Neutron Activation Analysis ◽  
Instrumental Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Trace Element ◽  
Thyroid Tissue ◽  
Tissue Levels ◽  
Trace Element Contents ◽  
Element Contents

Background: Thyroid cancer is an internationally important health problem. The aim of this exploratory study was to evaluate whether significant changes in the thyroid tissue levels of Ag, Co, Cr, Fe, Hg, Rb, Sb, Sc, Se, and Zn exist in the malignantly transformed thyroid. Methods: Thyroid tissue levels of ten trace elements were prospectively evaluated in 41 patients with thyroid malignant tumors and 105 healthy inhabitants. Measurements were performed using non-destructive instrumental neutron activation analysis with high resolution spectrometry of long-lived radionuclides. Tissue samples were divided into two portions. One was used for morphological study while the other was intended for trace element analysis. Results: It was found that contents of Ag, Co, Cr, Hg, and Rb were significantly higher (approximately 12.8, 1.4, 1.6, 19.6, and 1.7 times, respectively) in cancerous tissues than in normal tissues. Conclusions: There are considerable changes in trace element contents in the malignantly transformed tissue of thyroid.

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