Major developments in the understanding of the physics and chemistry of the atmospheric pressure spark discharge are presented and commented upon. These include work in the areas of equipment, initial gap breakdown, spark channel formation, electrode sampling phenomena, sample propagation phenomena, excited state production, related plasma physics, and counter electrode phenomena.
J. P. Walters, "Historical Advances in Spark Emission Spectroscopy," Appl. Spectrosc. 23, 317-331 (1969)