Abstract
Study of137Cs in rivers implies knowledge of its adsorption behaviour towards particulate matter and sediments and the possibility of low-level counting of water and solids. As the adsorption isotherms and kinetics will be discussed separately, this text focuses on the low level counting of137Cs. The use of flat-ended Ge(Li) detectors is compared to that of an anticoincidence array after preconcentration of the cesium ions into a ≤0.5 ml solid aliquot. The lower limits of determination at a relative standard deviation of 10% are ≈ 10 Bq · kg−1 for as received aliquots on a flat Ge(Li) detector and ≈ 10 mBq in case of preconcentration from water and counting in the anticoincidence facility. The eventual improvement of the accuracy by applying “moving average” and “smoothing” procedures are considered.
Similar content being viewed by others
References
R. N. J. COMANS, Water Res., 21 (1987) 1573.
R. N. J. COMANS, C. P. J. van DIJK, Nature, 336 (1988) No. 6195, 151.
R. N. J. COMANS et al., Chem. Geol., 70 (1988) 194.
H. MUNDSCHENK, DGM 27 (1983) 12.
H. D. LIVINGSTON et al., J. Geophys. Res., 90 (1985) 6971.
H. KAUTSKY, Deutsch. Hydr. Z., 38 (1985) 193.
Lj. CONKIC et al., Water Res., 22 (1988) 241.
E. GOLDBERG, J. P. RILEY, in: Chemical Oceanography, J. P. RILEY, G. SKIRROW (Eds), Academic Press, London, 1965.
U. P. NIJFFELER, et al., Geochim. Cosmochim. Acta, 48 (1984) 1513.
H. A. DAS, J. Radioanal. Nucl. Chem., 114 (1987) 207 and 115 (1987) 159.
T. VOLSOM, C. SREEKUMARAN, Some Reference Methods for Marine Studies. Reference Methods for Marine Radioactivity Studies, IAEA Technical Report Series No. 118, p. 129.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Das, H.A., Comans, R.N.J. On the limits of low level measurements of137Cs as a natural radiotracer. Journal of Radioanalytical and Nuclear Chemistry, Articles 139, 287–295 (1990). https://doi.org/10.1007/BF02061814
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02061814