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

中文翻译：

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对核废料中的 99Tc 进行超快速、选择性和伪定量分析，用于筛查目的


控制放射性在各个领域都是必不可少的，例如核电站的退役和核医学。在某些情况下，不需要对样品进行全面表征;相反，提供存在活动的总体指示的筛查分析足以确定样品是否具有放射性。本文介绍了一种名为 PSkits 的新系统，该系统专为 99Tc 的超快速和选择性筛选检测而设计。PSkits 由附着在闪烁瓶底部的塑料闪烁层组成，涂有 aliquat·336® 作为选择性萃取剂。在本研究中，通过调整交联剂、致孔剂和所用样品瓶类型的比例来优化 PSkit 的制备。开发了分析方法，并通过优化冲洗介质来测试对常见干扰物的选择性。最后，通过分析模拟核废料样品和尿液加标样品对 PSkit 进行了验证，获得了令人满意的结果，定量误差低于 50%，证明了它们对预期目的的有效性