The limit of detections of Ca, Cu, Cd, Pb, Hg, Fe, and Zn are determined to be 17, 11, 5, 45, 15, 28, and 3 ng mL −1. The analytical response curves for Ca, Cu, Cd, Pb, Hg, Fe, and Zn demonstrated good linearity. The optimized molarity of the solution is 0.2 M. Interfaced to atomic emission spectrometry (AES), its analytical performance is evaluated. Cathode (ground) connection is given to the solution at the V-groove itself. Plasma fluctuations arising from the variations in the gap between solid anode and liquid cathode were eliminated by providing a V-groove to the liquid glass-capillary. The present configuration leads to a stable plasma even at low flow rates (0.96 mL/min). An open-to-air type electrolyte cathode discharge (ELCAD) has been developed with a new design.
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