2026-04-13T09:48:36Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/2177002025-12-04T19:38:46Zcom_2072_1057col_2072_478813col_2072_478917

00925njm 22002777a 4500 dc Mendo, X. author Antoñanzas Melguizo, Eduardo author Bagán Navarro, Héctor author Tarancón Sanz, Alex author 2025-01-20T16:05:44Z 2025-01-20T16:05:44Z 2024-09-18 2025-01-20T16:05:44Z Controlling radioactivity is essential in various fields, such as the decommissioning of nuclear power plants and nuclear medicine. In some cases, a full characterization of samples is not required; instead, a screening analysis that provides an overall indication of the activity present can be sufficient to determine if a sample is radioactive. This article introduces a new system called PSkits designed specifically for ultra-fast and selective screening detection of 99Tc. PSkits consist of a plastic scintillation layer attached to the bottom of a scintillation vial, coated with aliquat·336® as a selective extractant. In this study, the preparation of PSkits was optimized by adjusting the proportions of crosslinker, porogen, and the type of vial used. The analysis method was developed, and the selectivity against common interferences was tested by optimizing the rinsing media. Finally, PSkits were validated by analysing simulated nuclear waste samples and urine spiked samples, achieving satisfactory results with quantification errors below 50 %, demonstrating their effectiveness for the intended purpose Plàstics Tecneci Residus perillosos Plastics Technetium Hazardous wastes Ultra-fast, selective and pseudo-quantitative analysis of 99Tc in nuclear waste for screening purposes