Instrumental neutron activation analysis of Obsidian rock

Ahmad, Shujaat; Chaudhary, Mayank; Qureshi, I. H.

doi:10.1007/bf02516235

Cited by 19 publications

(7 citation statements)

References 8 publications

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“…Comparison with Other Literature Values. The only other literature values available at this time are those published by Ahmad et al (28) for obsidian rock. By use of the criteria mentioned earlier, their results show significant disagreement with NBS for three certified elements (K, Fe, and Rb) and nine uncertified elements (Sc, Cr, Co, Ba, Ce, Gd, Tb, Yb, and Hf).…”

Section: Resultsmentioning

confidence: 99%

Determination of elements in National Bureau of Standards' geological standard reference materials by neutron activation analysis

Graham¹,

Glascock²,

Carni³

et al. 1982

Anal. Chem.

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33) Hatcher, P. G.; Breger, I. A.; Dennis, L. W.; Maclel, G. E. Prepr. Pap .-Am. Chem. SOC., Div. Fuel Chem., in press. (34) Maciel, G. E.; Szeverenyl, W. M.; Sullivan, M. J., to be submltted for publication. (35) Bloembergen, N. Physlca (Amsterdam) 1949, 15, 386. (38) Gerstein, B. C.; Chow, C.; Pembleton, R. G.; Wllson. R. C. J . Phys. Chem 1077 R I SA5 -. (37) Yokono, T.; Sanada, Y. Friel 1978, 57, 334. (38) Yokono, T.; Miyazawa, K.; Sanada, Y.; Marsh, H. Fuel 1979, 58, 896. (39) Qandy, D. W., Gulf Research and Development Co., private communlcatlon. (40) Retcofsky, H. L.: Stark, J. M.; Friedel, R. A. Anal. Chem. 1968, 40, 1899. (41) Retcofsky, H. L.; Hough, M. R.; Maguire, M. M.; Clarkson. R. B. "Advances in Chemistry Series"; Gorbaty, M. L., Ouchl, K.. Eds.; Amerlcan Chemical Society: Washington, DC, lg8l; No. 192, Chapter 4. (42) Abragam, A. "The Prlnclples of Nuclear Magnetism"; Oxford University Press: London, 1961; p 378. (43) Farrar. T. C.; Becker, E. D. "Pulse and Fourler transform NMR"; Academlc Press: New York, 1971; p 57. (44) Noggle, J. H.; Shirmer, R. E. "The Nuclear Overhauser Effect"; Academlc Press: New York, 1971. (45) Farrar, T. C.; Becker, E. D. "Pulse and Fourier Transform NMR"; Academic Press: New York, 1971. (46) Schaefer, J.; SteJskal, E. 0.; Buchdahl, R. Macromolecules 1975, 8 , 291. (47) VanderHart, D. L.; Earl, W. L.; Garroway, A. N. J . M a p . Reson. 1961, 44, 381. (48) Szeverenyl, N. M.; Sulllvan, M. J.; Maciel, G. E., unpublished work. (49) Dlxon, T. W. Uriano, (3. A.; Gravatt, C. C. Crit. Rev. Anal. Chem. 1977, 6 , Certiflcate of Analysls, Standard Reference Materlal SRM 688 Basak Rock: Office of Standard Reference Materials, National Bureau of Standards, U.S. Department of Commerce, Washington, DC. Certificate of Analysls, Standard Reference Material SRM 278 Obsidlan Rock; Offlce of Standard Reference Materials, Natlonal Bureau of Standards, US. Department of Commerce, Washington, DC. Ondov, J. M.; Zoller, W. H.; Oimez. I.; Aras, N. K.; Gordon, G. E.; Rancltelll, L. A.; Abel, K. H.; Filby, R. H.; Shah, K. R.; Ragaini. R. C. Anal. Chem. 1975, 4 7 , 1102-1109. Germani. M. S.; Gokmen, I.; Sigleo, A. C.; Kowalczyk, G. S.; Olmez, I.; Small, A. M.; Anderson, D. L.; Lepel, E. A.; Gordon, G. E.; Zoller, W. H. Anal. Chem. 1980, 52, 240-245. Certificate of Analysis, Standard Reference Material SRM 1633 Fly Ash; Offlce of Standard Reference Materials,

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Section: Resultsmentioning

confidence: 99%

Determination of elements in National Bureau of Standards' geological standard reference materials by neutron activation analysis

Graham¹,

Glascock²,

Carni³

et al. 1982

Anal. Chem.

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“…The optimized condition and the nuclear data used for the determination of trace amounts of uranium and thorium in building materials were the same as described by Ahmed et al (1981). The analytical results are given in Table 6 as the average of at least three determinations.…”

Section: Concentration Of Uranium and Thoriummentioning

confidence: 99%

Characterization of Local Egyptian Iron Ores for Use in Radiation Shielding Concrete

Ramadan¹,

Hodhod²,

Youssef³

et al. 2006

Health Physics

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Petrographic, physical, chemical, mechanical, and radioactive characteristics tests were performed on magnetite, limonite, and hematite found in abundance in Egypt to determine their suitability for producing radiation shielding concrete. The contents of uranium and thorium were determined using instrumental neutron activation analysis and gamma spectroscopy. The results obtained using the two methods have shown satisfactory correlation. The tests confirm that magnetite and limonite are suitable as concrete aggregate while hematite is not because of its friable nature and high contents of uranium, thorium, and cobalt.

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“…The optimized conditions and the nuclear data used for the determination of trace amounts of uranium and thorium in building materials were the same as described elsewhere [25]. The reliability of our method was checked by analyzing IAEA CRMs soil-7 and lake sediment (SL-1) for uranium and thorium.…”

Section: Neutron Activation Analysismentioning

confidence: 99%

Determination of natural radioactivity in building materials used in the Karachi area by γ-ray spectrometry and INAA

Zaidi¹,

Arif²,

Fatima³

2004

Radiochimica Acta

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Natural radioactivity / Primordial natural radionuclides / Indoor radioactive pollution / γ -ray spectrometry / INAA Summary. Samples of sand, stone and manufactured building materials collected from Karachi area have been analyzed for the primordial natural radionuclides 238 U, 232 Th and 40 K using γ -ray spectrometry. The uranium and thorium contents have also been determined by instrumental neutron activation analysis (INAA). The specific activities in these materials, having a radium equivalent activity less than 370 Bq kg −1 , when evaluated for radiological effects show that all materials meet the external γ -ray dose limitation of 1.5 mSv y −1 . The γ -ray spectrometric and INAA techniques complemented each other well in this study.

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Instrumental neutron activation analysis of Obsidian rock

Cited by 19 publications

References 8 publications

Determination of elements in National Bureau of Standards' geological standard reference materials by neutron activation analysis

Determination of elements in National Bureau of Standards' geological standard reference materials by neutron activation analysis

Characterization of Local Egyptian Iron Ores for Use in Radiation Shielding Concrete

Determination of natural radioactivity in building materials used in the Karachi area by γ-ray spectrometry and INAA

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