Gaschromatographische Spurenanalyse von leichtflüchtigen Halogenkohlenwasserstoffen in Wässern mittels simultaner ECD/FID‐Detektion

Abstract

Summary:The substances which are expulsed from the water sample by E nitrogen current are first adsorbed on a column filled with Tenax GC and subsequently expulsed a t 200 O C and fed into the gas-chromatographic column. The parallel detection improves the identification of individual substances and makes the detection of aromatics possible a t the same time. Characteristics of the process (detection limit, standard deviation, coefficient of variation, rate of retrieval) are determined and examples of analysis are given. For a water sample of 10 ml the detection limit !ies a t or below 1 yg/l. Einfiihrung