A System for Generating a Flowing Gas Concentration Signal.

摘要

The theory, design, and performance of a computer-controlled gas sampling system, utilizing a linear electric motor to pump a liquid metal for the generation of concentration input signals, is presented. Computer control of the current passing through mercury droplets interspaced by gas samples enables control of the amplitude and frequency (1-10 hertz range) of the concentration profile. The system is discussed in terms of the advantages of reproducibility, reliability, and speed resulting from a design with no moving parts. Possible applications in analytical chemistry are numerous, but cross-correlation and other multiple injection chromatographic experiments are of current interest to the authors. (Author)