The method of tritium activity measurements by electrolytic enrichment in combination with liquid scintillation counting is well known for many years. In the Water Research Institute in Bratislava was this system employed since the 60-ties of the 20th century. In 2018 the laboratory of radiochemistry of Water Research Institute obtained a new electrolytic enrichment system with higher enrichment factor (varying from 9 to 22, depending on the total ampere-hours used). The enrichment factor of the previous system was about 6. Complementary to the new system, also the new LCS counter Quantulus GCT 6220 was added. This spectrometer has active background suppression function (Guard Compensation Technology - GCT) and for the tritium measurement the background counts decreased from cca. 9 cpm (for Tricarb 2900 TR) to approximately 1 cpm. To demonstrate the capabilities of this system, we present results of the tritium concentration in precipitations during the period from May 2016 to May 2019. The seasonal variations of tritium activities in precipitation are observed, with maximum values in spring season and minimum in winter. Additionally, selected tritium activities from the extensive monitoring of river waters in Slovakia are presented.

中文翻译：

---

布拉迪斯拉发水研究所使用的新型电解富集系统测定determination，这是沉淀中activity活性的第一项结果。

通过电解富集与液体闪烁计数相结合的measurements活性测量方法是众所周知的。该系统自20世纪60年代开始在布拉迪斯拉发的水研究所使用。在2018年，水研究所的放射化学实验室获得了一个新的电解浓缩系统，该系统具有更高的富集系数（从9到22取决于所使用的总安培小时数）。先前系统的浓缩系数约为6。作为新系统的补充，还添加了新的LCS计数器Quantulus GCT 6220。该光谱仪具有主动背景抑制功能（Guard Compensation Technology-GCT），对于for测量，背景计数从cca开始降低。9 cpm（对于Tricarb 2900 TR）约为1 cpm。为了证明该系统的功能，我们介绍了2016在2016年5月至2019年5月期间的浓度结果。观察到precipitation中的activities气活动具有季节性变化，春季的最大值，冬季的最小值。此外，还介绍了从斯洛伐克河水的广泛监测中选择的tri活动。