Authors:M. Appenteng, A. Golow, D. Carboo, D. Adomako, M. Hayford, A. Yamoah, D. Saka, and D. Sarfo
Instrumental neutron activation analysis based on thermal neutrons from the Ghana Research Reactor-1 facility was utilized
to analyze 18 trace elements namely Al, As, Br, Ca, Cd, Cl, Co, Cu, Fe, K, Mg, Mn, Na, Ni, S, Si, V, and Zn in two different
crude oil samples from the Saltpond and Jubilee field in the Saltpond, Central region and Cape Three Points, Western region
of Ghana, respectively. The sulfur concentration for both samples were low and within globally accepted range of 0.1–0.5%wt
for sweet crude oil. The results of the elemental analysis showed that the two samples are relatively low in trace element
concentrations compared to crude oils of other countries. Higher Fe concentration in the Jubilee crude oil indicates younger
oil. The V/Ni ratios obtained for crude oils from both locations imply a possible marine organic origin and also suggest the
Saltpond crude oil is more matured than the Jubilee crude oil.
Authors:M. Bounakhla, L. Mrabet, R. Jacimovic, K. Embarch, H. Bounouira, A. Benchrif, and B. Attrassi
The aim of this study is to evaluate the sensitivity of Ko-method of Instrumental Neutron Activation Analysis for minor, trace
and toxic elements in the most consumed foodstuff purchased from large commercial markets in Kenitra’s city (Morocco) which
has been chosen for a pilot project on food monitoring in the west of Morocco. Samples have been analyzed by Ko-INAA method
using TRIGA Mark II reactor at Josef Stefan Institute in Slovenia. The quality control of results was assessed using the Standard
Reference Material SRM 1547 (Peach leaves). Results show an adequate sensitivity for the most studied elements in foodstuffs
except for beef, onion and whole wheat which show a high sensitivity factor for Cd and As. INAA seems to be an adequate choice
for element analysis in foodstuffs.
Authors:Yong Chung, Sun Kim, Gwang Sun, Jong Lim, Jong Moon, Kye Lee, Young Kim, Jong Choi, and Ju Lee
The analysis of mineral contents in space foods is needed to obtain an information on a comprehensive elemental composition
as well as the investigation on the effects of human nutrition and health based on the dietary intake of mineral elements.
Recently, six items of new Korean space foods (KSFs) such as kimchi, bibimbap, bulgogi, a ramen, a mulberry beverage and a
fruit punch which was developed by the KAERI, and the contents of more than 15 elements in the samples were examined by using
instrumental neutron activation analysis (INAA). Five biological certified reference materials, NIST SRM were used for analytical
quality control. The results were compared with those of common Korean foods reported, and these results will be applied toward
the identification of irradiated foods.
Authors:D. Mishra, R. Acharya, K. Swain, R. Joshi, V. Joshi, P. Verma, A. Hegde, and A. Reddy
Thorium along with its daughter products present in the soil is one of the major contributors to the external gamma dose in
the environment. To establish the dose levels, quantification of thorium contents in soil samples is very important. As a
part of pre-operational environmental radiological surveillance, a total of 23 soil and six sand samples were collected from
different locations around the proposed nuclear power plant site of Jaitapur, Maharashtra. Thorium concentrations in these
samples were determined by instrumental neutron activation analysis (INAA). Samples were irradiated with neutrons in Apsara
reactor at a neutron flux of ~5 × 1011 cm−2 s−1 and radioactive assay was carried out using high resolution gamma ray spectrometry. Relative method of INAA was used for
quantification of thorium utilizing 311.9 keV gamma ray of 233Pa, the daughter product of 233Th. The concentrations of thorium in the soil and sand samples were in the ranges of 4.0–18.8 and 1.2–6.2 mg kg−1 respectively.
Autopsy of 29-year old woman suspicious of committing suicide by the ingestion of As2O3 yielded contradictory findings. All pathological findings as well as clinical symptoms suggested acute poisoning, while a
highly elevated As level of 26.4 μg g−1 in her hair collected at the autopsy, which was determined with inductively coupled plasma mass spectrometry indicated chronic
poisoning. To elucidate this discrepancy, instrumental neutron activation analysis (INAA) with proven accuracy was performed
of another set of sectioned hair samples. Levels of As found by INAA in the range of 0.16–0.26 μg g−1 excluded chronic poisoning, because the person died after approximately 14 h after the As2O3 ingestion. Two reasons for the discordant As results obtained by ICP-MS and INAA are considered: (1) accidental, non-removed
contamination of hair on the As2O3 ingestion; (2) erroneous performance of ICP-MS.
Authors:Yong Chung, Sun Kim, Gwang Sun, Jong Lim, Jong Moon, Kye Lee, and Hwa Yoo
The aim of the research is to find out better medicinal stuff for thyroid cancer patients who are required to have a low level
iodine diet. Iodine contents in 12 kinds of oriental herbal medicinal prescriptions, which are frequently used for thyroid
cancer patients, are determined using instrumental neutron activation analysis. The biological certified reference material
was used for analytical quality control. The relative errors and standard deviations for the iodine analysis were less than
2.88 and 18.5%, respectively. The level of iodine contents for four medicinal samples detected was in the range of about 3–210 mg/kg,
the concentrations of eight samples were estimated from the detection limit under the given analytical conditions. In addition,
the informative concentrations of 17 essential elements with special functions such as Al, As, Ba, Br, Ca, Cl, Cr, Fe, K,
Mg, Mn, Na, Rb, Sr, Ti, V, and Zn in the samples were also determined together with their detection limits for data inter-comparison.
The relative errors and standard deviations for these elements were in the range of 0.1–18.0%, and 2–20%, respectively.
Authors:S. Lin, C. Chiang, C. Huang, C. Tseng, and M. Yang
Five kinds of urinary stones from 42 patients have been determined for a total of 19 elements by instrumental neutron activation analysis. Of these elements, Ca, Mg, Sr, Na, and Cl are found to be present in the core of all kinds of stones. The differences in elemental composition among the different kinds of stones as well as across the layers of stone are statistically evaluated.
An instrumental neutron activation analysis technique has been developed for the simultaneous determination of up to 30 elements
including major, minor and trace elements in Obsidian Rock (a proposed NBS-SRM-278). INAA method involves both short and long
irradiations followed by gamma-ray activity measurement with a Ge(Li) detector. The accuracy of the procedure has been checked
by analyzing IAEA Reference Materials.
Instrumental neutron activation analysis has been used to determine 15 trace elements in twelve blood serum samples taken from healthy students at Bilkent University in Ankara. The method allowed the determination of Sc, Cr, Mn, Fe, Co, Zn, Se, Rb, Cs, Ce, Eu, Tb, Hf, Ta and Hg, which occur at the g.ml–1 to ng.ml–1 levels. There are no values reported for Tb, Hf, Ce, Eu and Ta before. The other results are compared with the values reported in the literature. Most are in the range of the reported values except for Fe, Zn, Se and Cs.
Authors:A. Grimanis, M. Vassilaki-Grimani, and M. Karayannis
Instrumental neutron activation analysis has been applied for the determination of 20 minor and trace elements (As, Ce, Co,
Cr, Cs, Eu, Fe, Hf, La, Lu, Na, Rb, Sb, Sc, Sm, Ta, Tb, Th, Yb and Zn) in two groups of potsherds which had been excavated
at two different sites of Greece, the islands of Thasos (Group A) and Delos (Group B). A good agreement for all the elements
examined between the pottery specimens of Groups A and B was found. The matching in chemical composition between the stylistically
related potteries of Group A (Thasos) and Group B (Delos) provides strong support for the archaeologist's hypothesis that
the two groups of potsherds belong to the same major group of “melian” pottery.