Components of emission spectra of a drop-spark discharge (DSD) were investi
gated. The discharge was generated in the air gap between oppositely charge
d approaching surfaces of electrolyte drops. Kinetic characteristics of maj
or components of the DSD spectra were studied. It was demonstrated that the
se characteristics can be used for the separation of net signals from the s
pectral background. Calibration curves are presented for the determination
of K, Mg, and Ca in the concentration range from 0.1 to 10.0 mM.