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 7
The effect of the solution pH on emission intensity (electrolytes: 5 mg L−1 K, Ca, Na, and Mg solution, discharge voltage: 650 V, flow rate: 3 mL min−1, interelectrode gap: 2 mm, and capillary diameter: 1 mm).