Environmental: POP traces in icy heights

GA43_PCB_Map

Scientists, among them experts from the Helmholtz Center for Environmental Research (UFZ) in Leipzig, Germany, went on an expedition to South America. Their goal was the eternal snow cap of the Cerro Aconcagua, at 6962 meters the highest mountain in the Americas. Source: GERSTEL

The GERSTEL Twister is small and easy to handle: For sensitive determination of PCBs in water, only a 40 mL sample is needed. An important fact, especially when samples have to be carried in your personal back pack at 6000 meter elevation, where every gram counts.

TDSA/TDS-GC/MS system

TDSA/TDS-GC/MS system used at the UFZ for automated desorption and analysis of up to 20 Twisters. As an alternative, the Thermal Desorption Unit (TDU) in combination with the MultiPurpose Sampler (MPS) performs automated analysis of up to 196 Twisters in one batch. Image: Guido Deußing

Chromatogram

Chromatogram resulting from a snow sample taken at 6200 Meter elevation: Finding PCBs on the highest point of the Andes is proof of long-range atmospheric transport (LRAT) and accumulation of persistent organic pollutants (POPs) in the Southern hemisphere. Photo montage: GERSTEL