We applied passive equilibrium sampling using silicone-based chemometers to nine biota species, sediment, and water in a multimedia aquatic ecosystem. They allowed for direct comparison of the concentration of regulated and emerging hydrophobic organic compounds in the silicone across species as well as the comparison of biota with sediments and water. We derived chemometer-based trophic magnification factors (TMFs) of diverse compounds that agreed with the traditionally derived TMFs. Our exploratory work in water demonstrated that equilibrium with newly designed chemometers can be achieved in few days for compounds with a log K_OW up to 6. We calculated activity ratios, dividing the concentrations in the silicone equilibrated with biota by those equilibrated with the abiotic exposure media (sediments and water), assessing the thermodynamics of bioaccumulation and the equilibrium state between the ecosystem compartments. They confirmed that the biota were below equilibrium partitioning relative to sediments and water, as other studies have described. Silicone-based chemometers open up new opportunities and applicability in multimedia aquatic ecosystems for studies that rely on equilibrium partitioning of the in-situ mixtures of chemicals, such as multimedia assessments or application of effect-based methods.

中文翻译：

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从营养放大因子到多媒体活性比：化学计量器作为研究水生生态系统中疏水性有机化合物命运的通用工具


我们使用基于硅的化学计对多媒体水生生态系统中的九种生物群、沉积物和水进行了被动平衡采样。它们允许直接比较不同物种的有机硅中受管制和新兴的疏水性有机化合物的浓度，以及生物群与沉积物和水的比较。我们得出了不同化合物的基于化学计的营养放大因子 （TMF），这些因子与传统衍生的 TMF 一致。我们在水中的探索性工作表明，对于log K_OW高达6的化合物，使用新设计的化学反应计可以在几天内达到平衡。我们计算了活性比，将与生物群平衡的有机硅中的浓度除以与非生物暴露介质（沉积物和水）平衡的浓度，评估生物积累的热力学和生态系统隔室之间的平衡状态。他们证实，正如其他研究所描述的那样，生物群相对于沉积物和水处于平衡分配状态。基于硅的化学计为多媒体水生生态系统开辟了新的机会和适用性，适用于依赖于化学原位混合物平衡分配的研究，例如多媒体评估或基于效果的方法的应用。