We investigated the performance of the Chemcatcher
®, an aquatic passive sampling device consisting of a sampler
body and an Empore
® disk as receiving phase, when used to monitor acetochlor, alachlor, car
bofuran, chlorfenvinphos,
border="0">-endosulfan, fenpropidin, linuron, oxadiazon, pirimicar
b and te
buconazole in 16 Central European streams. The Chemcatcher
®, equipped with an SDB-XC Empore
® disk, detected seven of the aforementioned pesticides with a total of 54 detections. The time-weighted average (TWA) concentrations reached up to 1
bc;g/L for acetochlor and alachlor. Toxic units derived from these concentrations explained reasona
bly well the o
bserved ecological effects of pesticide stress, measured with the SPEAR index. In a follow-up analysis, we compared the Chemcatcher
® performance with those of two other sampling systems. The results o
btained with the Chemcatcher
® closely matched those of the event-driven water sampler. By contrast, the TWA concentrations were not significantly correlated with concentrations on suspended particles. We conclude that the Chemcatcher
® is suita
ble for the monitoring of polar organic toxicants and presents an alternative to conventional spot sampling in the monitoring of episodically occurring pollutants.