Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstädter Landstrasse 1, D-85764 Neuherberg, Germany.
Environ Pollut. 2009 Dec;157(12):3272-9. doi: 10.1016/j.envpol.2009.05.043. Epub 2009 Jun 23.
Atmospheric sampling of organochlorine pesticides (OCPs) was conducted using Semi Permeable Membrane Devices (SPMDs) deployed in the Alps at different altitudinal transects for two consecutive exposure periods of half a year and a third simultaneous year-long period. Along all the altitude profiles, the sequestered amounts of OCPs increased in general with altitude. SPMDs were still working as kinetic samplers after half a year for the majority of the OCPs. However, compounds with the lowest octanol-air partition coefficient (K(oa)), reached equilibrium within six months. This change in the SPMD uptake was determined for the temperature gradient along the altitude profile influencing K(oa), OCPs availability in the gaseous phase, and SPMD performance. In sum, it seems two effects are working in parallel along the altitude profiles: the change in SPMD performance and the different availability of OCPs along the altitudinal transects determined by their compound properties and concentrations in air.
采用半渗透膜装置（SPMDs）对阿尔卑斯山不同海拔梯度进行了为期半年的两次连续暴露期和第三次同时进行的为期一年的大气采样，以采集有机氯农药（OCPs）。在所有海拔剖面中，OCPs 的隔离量通常随海拔升高而增加。对于大多数 OCPs 来说，SPMD 在半年后仍作为动力学采样器工作。然而，具有最低辛醇-空气分配系数（K（oa））的化合物在六个月内达到平衡。这种 SPMD 吸收的变化是由沿海拔剖面影响 K（oa）的温度梯度、气态 OCPs 的可用性以及 SPMD 性能决定的。总的来说，似乎有两个因素沿着海拔剖面同时起作用：SPMD 性能的变化以及由化合物性质和空气中浓度决定的 OCPs 在海拔梯度上的不同可用性。
