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Improved Results Using Higher Ratios of Scintillator Solution to Benzene in Liquid Scintillation Spectrometry

Published online by Cambridge University Press:  18 July 2016

Motoharu Koba
Motoharu Koba*
Affiliation:
Institute of History and Geography, Faculty of Letters, Kansai University, Suita, Osaka 564-8680, Japan. Email: [email protected]
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Abstract

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Practical effects of the volumetric or weight ratio of scintillator solution to sample benzene in liquid scintillation spectrometry were examined here for radiocarbon dating. It is concluded, using a LKB-Wallac Quantulus™ 1220 and Teflon™-copper 3 mL vials with scintillator of toluene-based PPO and POPOP, that solutions containing the same concentrations of the same ratio, 1.3 or more, of scintillator solution to sample benzene show the same cpm/g and the same channel value of external standard spectrum, irrespective of different gross volumes of solutions. The addition of scintillator solution reduces background in 0.5 mL or so of benzene, and results in an appreciably enlarged figure of merit.

Type
Articles
Information
Radiocarbon , Volume 42 , Issue 2 , 2000 , pp. 295 - 303
Copyright
Copyright © 2000 by the Arizona Board of Regents on behalf of the University of Arizona 

References

Ambers, J, Leese, M, Bowman, S. 1986. Detection of bias in the background of vials used for radiocarbon dating. Radiocarbon 28(2A):586–91.Google Scholar
Gupta, S, Polach, H. 1985. Radiocarbon dating practices at Australian National University. Handbook of Radiocarbon Laboratory, Research School of Pacific Studies. Canberra: Australian National University. p 173.Google Scholar
Hiller, A, Anderson, R, Cook, GT. 1996. Effects of a range of quenching agents on 14C-benzene counting efficiency when employing pulse-shape analysis (TR-LSC). In: Cook, GT, Harkness, DD, MacKenzie, AB, Miller, BF, Scott, EM, editors. Liquid scintillation spectrometry 1994. Tucson: Radiocarbon. p 347–55.Google Scholar
Hogg, AG, Noakes, JE. 1992. Evaluation of high-purity synthetic silica vials in active and passive vial holders for liquid scintillation counting of benzene. Radiocarbon 34(3):394–401.Google Scholar
Kalin, RM. 1989. A beta test comparison between the new Packard 2260XL and the LKB Quantulus and 1219 SM: low-level radiocarbon and tritium determinations. Radiocarbon 31(3):368–73.CrossRefGoogle Scholar
Kashida, Y, Iwakura, T. 1965. Recent progress in liquid scintillation counting (in Japanese). Radioisotopes 14: 152.Google Scholar
Pawlyta, J, Pazdur, A, Rakowski, AZ. 1998. Commissioning of a Quantulus 1220 liquid scintillation beta spectrometer for measuring 14C and 3H at natural abundance levels. Radiocarbon 40(1):201–9.Google Scholar
Polach, H, Gower, J, Kojola, H, Heinonen, A. 1983. An ideal vial and cocktail for low-level scintillation counting. In: McQuarrie, SA, Ediss, C, Wiebe, LI, editors. Advances in scintillation counting. University of Alberta Press. p 508–25.Google Scholar
Polach, H, Kaihola, L, Robertson, S, Haas, H. 1988. Small sample 14C dating by liquid scintillation spectrometry. Radiocarbon 30(2):153–5.Google Scholar
Rauret, G, Mestres, JS, Garcia, JF. 1989. Optimization of liquid scintillation counting conditions with two kinds of vials and detector shields for low-activity radiocarbon measurements. Radiocarbon 31(3):380–6.Google Scholar
Tamers, MA. 1965. Routine carbon-14 dating using liquid scintillation techniques. Radiocarbon and tritium dating. USAEC Conf 650652. p 53–67.Google Scholar
Wallac, Oy. 1995. Manual of 1220-305 Queue Manager. Software Ver. 1.2 for controlling Wallac Quantulus.Google Scholar