The optimization and validation of a procedure for the determination of tritium from gaseous effluents from a nuclear power plant is described. Optimization included performance assessment of silica gel and a molecular sieve as a material for the adsorption of water moisture from air for continuous tritium sampling. In addition, the usability of such a system for monitoring tritium in laboratory air for low-level tritium measurements was assessed. The molecular sieve showed better performance, with an average desorption efficiency of 95% compared to 78% achieved with silica gel. The memory effect was also lower and more reproducible for the molecular sieve, amounting to 7% on average compared to 35% attained for silica gel. Measurement of low-level tritium in air showed the importance of prior checks of intrinsic tritium levels in the molecular sieve as due to that erroneous results could be produced.

中文翻译：

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核电厂废气中氚测定程序的优化和验证

描述了测定核电厂废气中氚的程序的优化和验证。优化包括对硅胶和分子筛作为材料从空气中吸附水分以进行连续氚采样的性能评估。此外，还评估了这种用于监测实验室空气中氚以进行低水平氚测量的系统的可用性。分子筛表现出更好的性能，平均解吸效率为 95%，而硅胶为 78%。分子筛的记忆效应也更低，重现性更好，平均为 7%，而硅胶为 35%。