A method for the determination of fragrance substance concentrations in the ambient air by means of elektroantennogrammen

摘要

A device for recording electroantennograms in open air conditions has a vertical main pipe for leading the air to be measured into an analyser and a random controlled regulator (8, 13) which reacts to a control signal and tightly connects a calibrating unit (7) to an inlet hole (9) in the main air pipe (3) depending on the control signal. This allows a great number of dosing pumps to be used per calibrating unit.