Equipment

Two instruments have been developed by the Chemistry Department of the University of Nottingham. The gas sampling valve, which is connected to conventional gas handling equipment, has been designed to permit the introduction of volatile samples into a gas chromatograph without interruption of carrier gas flows. The sample loop, which is inter‐changeable, can be evacuated to 10–6 torr, filled with sample which can be isolated, and introduced into the chromatograph for analysis when desired.