The river Alb close to the city of Karlsruhe was chosen as
sampling site to analyze the distribution and occurrence of Pt
in an aquatic system. The river Alb originates near Bad Herrenalb,
located in the German state of Baden-Wu
¨
rttemberg
and flows 52 km until it empties into the river Rhine near
Karlsruhe. The Alb has a watershed of 457 km
(Regierungspr
€
asidium Karlsruhe, 2009).