QUALITY ASSURANCE OF THE OCEANOGRAPHIC TRACERS TC-99 AND ANTIMONY-125 - INTERCOMPARISONS AND RECOVERY TESTS

被引：5

作者：

DAHLGAARD, H

HERRMANN, J

VANWEERS, AW

MASSON, M

IBBETT, RD

CHEN, Q

机构：

[1] Risø National Laboratory

[2] Bundesamt für Seeschiffahrt und Hydrographie (BSH), D-20305 Hamburg

[3] Netherlands Energy Research Foundation (ECN)

[4] Institut de Protection et de Sûreté Nucléaire (IPSN), Laboratoire de Radioécologie Marine, F-50130 Octeville, Rue Max Pol Fouchet

[5] Directorate of Fisheries Research, MAFF, Fisheries Research Laboratory, Lowestoft

来源：

JOURNAL OF MARINE SYSTEMS | 1995年 / 6卷 / 5-6期

关键词：

D O I：

10.1016/0924-7963(95)00015-H

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Five large seawater samples and two samples of dried seaweed (Fucus sp.) powder have been analyzed radiometrically for low concentrations of Tc-99 by five European institutions. Some of the water samples were analyzed further for Sb-125. The overall standard deviation (SD) for Tc-99 in the two seaweed samples was 8% and 5%, respectively. The consistency of the seawater results was correlated to the concentration levels. For concentrations > 1 Bq Tc-99 m(-3), the SD was better than 20%, whereas for the 0.5 Bq m(-3) level, 50% SD was observed utilizing all data. It is recommended for future collaborative programmes utilizing Tc-99 - and other radionuclides requiring rigorous radioanalytical procedures - that a large, homogeneous sample is identified at an early stage and random sub-samples taken at frequent intervals for intercalibration purposes throughout the period of study. Recovery tests performed at all five laboratories showed no systematic bias in the analysis of Tc-99.

引用

页码：391 / 396

页数：6

共 9 条

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