Determination of uranium and thorium at the sub-ng/g-level in high-purity aluminium by radiochemical neutron activation analysis

1987 ◽  
Vol 327 (2) ◽  
pp. 119-122 ◽  
Author(s):  
K. P. Egger ◽  
V. Krivan
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
High Purity ◽  
Radiochemical Neutron Activation Analysis ◽  
Purity Aluminium ◽  
High Purity Aluminium

scholarly journals Determination of molybdenum in high-purity iron by radiochemical neutron activation analysis.

1999 ◽  
Vol 48 (4) ◽  
pp. 421-427 ◽  
Author(s):  
Naoki YAMAGUCHI ◽  
Yukiko OKADA ◽  
Shogo SUZUKI ◽  
Shoji HIRAI ◽  
Toshiaki MITSUGASHIRA
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
High Purity ◽  
Radiochemical Neutron Activation Analysis ◽  
Purity Iron ◽  
High Purity Iron

scholarly journals Determination of the content of impurity elements in a sample of high purity India by the method of radiochemical neutron activation analysis

2022 ◽  
Vol 2155 (1) ◽  
pp. 012023
Author(s):  
I.I. Sadikov ◽  
B. Kh. Yarmatov ◽  
T.M. Usmanov ◽  
Z.O. Sadikova
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
High Purity ◽  
High Efficiency ◽  
Detection Limits ◽  
Radiochemical Neutron Activation Analysis ◽  
Pure Substances ◽  
Impurity Elements

Abstract The present article is devoted to the development of a method for neutron activation analysis of a microimpurity composition of high-purity indium with the radiochemical separation of indium radionuclides from radionuclides of the determined elements by extraction chromatography in the system tributyl phosphate (TBP) - solutions of hydrobromic acid (HBr). Neutron activation analysis (NAA) has a special place among the physical methods for determining the trace composition of high-purity substances. Low detection limits, the possibility of simultaneous determination of a large number of impurity elements from one sample, no correction for the control experiment, the possibility of using inactive carriers in separating traces of radionuclides of impurity elements from matrix elements ensured the widespread use of NAA in the analysis of highly pure substances. The developed technique allows separating matrix radionuclides from radionuclides of impurity elements with high efficiency and determination of 28 impurity elements in high-purity indium with detection limits of 0.7 ppm to 0.05 ppb.

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