Groning M, Auer R, Brummer D, Jaklitsch M, Sambandam C, Tanweer A, Tatzber H
Isotope Hydrology Laboratory, Agency's Laboratories, International Atomic Energy Agency, Vienna, Austria.
Isotopes Environ Health Stud. 2009 Jun;45(2):118-25. doi: 10.1080/10256010902872042.
Several improvements are described for the existing tritium enrichment system at the Isotope Hydrology Laboratory of the International Atomic Energy Agency for processing natural water samples. The improvements include a simple method for pretreatment of electrolytic cells to ensure a high tritium separation factor, an improved design of the exhaust system for explosive gases, and a vacuum distillation line for faster initial preparation of water samples for electrolytic enrichment and for tritium analysis. Achievements included the reduction of variation of individual enrichment parameters of all cells to less than 1% and an improvement of 50% of the stability of the background mean. It resulted in an improved detection limit of less than 0.4 TU (at 2s), important for application of tritium measurements in the future at low concentration levels, and resulted in measurement precisions of+/-0.2 TU and+/-0.15 TU for liquid scintillation counting and for gas proportional counting, respectively.
国际原子能机构同位素水文实验室现有氚浓缩系统针对天然水样品处理进行了多项改进。改进措施包括一种用于电解池预处理的简单方法，以确保高氚分离系数；改进爆炸气体排放系统的设计；以及一条真空蒸馏线，用于更快地初步制备用于电解浓缩和氚分析的水样。成果包括将所有电解池的各个浓缩参数变化降低至1%以下，并将背景平均值的稳定性提高了50%。这使得检测限提高到小于0.4 TU（2s），这对于未来低浓度水平氚测量的应用很重要，并且分别使液体闪烁计数和气体正比计数的测量精度达到±0.2 TU和±0.15 TU。
