Rhine monitoring station

Gas chromatography-mass spectrometry (GC-MS) is a method that combines two standard methods, to identify carbon compounds, so-called „organic” molecules, in bodies of water. Including (among others) pesticides, most drugs and many pollutants.
Liquid chromatography-mass spectrometry (LC-MS) works in a similar way to GC-MS. It allows larger, polar compounds, like many endogenous substances to be analysed.