Compared to grab samples, passive samplers have the advantage that they sample over a longer time period and can detect lower compound concentrations in water quality monitoring campaigns. To allow the determination of time-weighted average concentrations, however, sampler uptake should remain linear in time over the entire sampling period. Therefore, the time integrative or linear uptake properties of adsorption-based Speedisks and partitioning-based silicone rubber samplers were assessed with respect to chemically analyzed single compounds and measured bioactivity in in vitro bioassays. Both sampler types were deployed in consecutive and overlapping time series in a WTTP effluent and in the river Meuse up to 105 days. Extracts were chemically analyzed for PCBs, PAHs and pesticides and tested in the Aliivibrio fischeri and DR-LUC bioassays. Speedisks showed time integrative sampling for the detected pesticides as well as for bioassay responses at both sampling locations for the entire sampling period. The silicone rubber samplers showed poor linear uptake in time for the unknown compounds causing bioassay responses. The bioassay results indicate that conversion of a bioassay response to a passive sampler extract into a time-weighted average bioactivity per liter water seems justified for Speedisks, confirming that concentrations in the samplers correspond to a single volume of sampled water for all compounds. The bioassay results also indicate that a similar conversion for silicone rubber extracts should be interpreted with caution. In principle, it is also impossible, because the concentration of each compound contributing to the bioassay response corresponds to a different sampled water volume.

与抓取样品相比，被动采样器的优势在于可以在更长的时间内采样，并且可以在水质监测活动中检测到较低的化合物浓度。但是，为了确定时间加权平均浓度，在整个采样期间内，采样器的吸收时间应保持线性。因此，就化学分析的单个化合物和体外生物测定中测得的生物活性而言，评估了基于吸附的Speedisk和基于分区的硅橡胶采样器的时间积分或线性吸收特性。两种采样器都以连续和重叠的时间序列部署在WTTP废水和默兹河中长达105天。对提取物进行多氯联苯，多环芳烃和农药的化学分析，并在拟南芥和DR-LUC生物测定。Speedisk显示了在整个采样期间内两个采样位置对检测到的农药以及生物测定响应的时间积分采样。对于未知化合物，硅橡胶采样器显示出较差的线性吸收时间，从而引起生物测定反应。生物测定的结果表明，对于Speedisks，将生物测定对被动式采样器提取物的响应转换为每升水的时间加权平均生物活性似乎是合理的，这证实了采样器中的浓度对应于所有化合物的单倍采样水量。生物测定结果还表明，应谨慎解释硅橡胶提取物的类似转化。原则上，这也是不可能的，