Large volume, low discrimination GC injection into a modified splitless injector

Summary A standard GC split/splitless injector was sealed with an airlock. The carrier gas and the sample were introduced through this valve. Such a configuration efficiently prevents an injector overflow. Injections up to 50 μL were made. An almost quantitative analyte and solvent transfer was observed, with only a minimal discrimination, of even volatile analytes. The use of an early vapor exit permitted a high initial liner flow and therefore a fast sample transfer.