Polar organic chemical integrative sampler (POCIS) devices have been suggested for measuring time-weighted averages (TWAs) of contaminant concentrations resulting from chemical leak accidents in aquatic environments. However, the response of the POCIS device in the emergency condition in natural water remains unclear. The response of the POCIS device to contaminant fluctuation was investigated using a chamber test with tap water and a channel test with natural water. The fluctuation in the chamber and the channel simulated the condition of river water under a chemical leak scenario (maximum concentration: 1–10 μg L^–1, half-life: 1 day). The target chemicals were neonicotinoid pesticides (dinotefuran, clothianidin, thiamethoxam, imidacloprid, acetamiprid, and thiacloprid) and bisphenol A. The ratio of the POCIS measured value to the TWA values of grab samplings (POCIS/TWA) for the channel test (temperature: 15 °C, flow velocity: 15 cm s^–1) ranged from 61% (clothianidin) to 133% (thiacloprid). The results indicated that the POCIS device could be effectively used as a monitoring device in an aquatic environment under the chemical leak scenario over a time period of more than14 days. In addition, the POCIS/TWA ratios obtained from the chamber test and the channel test were in the range of 50–150%. Thus, the chamber test could be used to evaluate the POCIS device at a low cost. Environ Toxicol Chem 2021;40:3010–3018. © 2021 SETAC

中文翻译：

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模拟峰浓度事件的两种验证系统中极性有机化学综合进样器的比较评估

极性有机化学综合采样器 (POCIS) 设备已被建议用于测量水生环境中化学泄漏事故导致的污染物浓度的时间加权平均值 (TWA)。然而，POCIS装置在天然水中紧急情况下的响应仍不清楚。POCIS 设备对污染物波动的响应通过使用自来水的腔室测试和使用天然水的通道测试来研究。腔室和通道的波动模拟了化学泄漏情景下的河水状况（最大浓度：1-10 μg L ^-1，半衰期：1天）。目标化学品为新烟碱类农药（呋虫胺、噻虫胺、噻虫嗪、吡虫啉、啶虫脒和噻虫啉）和双酚 A。 通道测试的 POCIS 测量值与抓取采样的 TWA 值 (POCIS/TWA) 的比值（温度： 15 °C，流速：15 cm s ^–1 ) 范围为 61% (clothianidin) 至 133% (thiacloprid)。结果表明，POCIS装置可以有效地用作化学品泄漏情景下水生环境中的监测装置，时间跨度超过14天。此外，从腔室测试和通道测试中获得的 POCIS/TWA 比率在 50-150% 的范围内。因此，腔室测试可用于以低成本评估 POCIS 设备。环境毒物化学2021；40:3010–3018。© 2021 SETAC