Research Article
High-Sensitivity Determination of K, Ca, Na, and Mg in Salt Mines Samples by Atomic Emission Spectrometry with a Miniaturized Liquid Cathode Glow Discharge
Figure 6
Effect of the supporting electrolyte (electrolytes: 5 mg L−1 K, Ca, Na, and Mg solution adjusted to pH = 1.0 by support acid, discharge voltage: 650 V, flow rate: 3 mL min−1, interelectrode gap: 2 mm, and capillary diameter: 1 mm).