High-Sensitivity Determination of K, Ca, Na, and Mg in Salt Mines Samples by Atomic Emission Spectrometry with a Miniaturized Liquid Cathode Glow Discharge

Table 2

Comparison of the LODs obtained by LCGD-AES system with other ELCAD-AES systems for the detection of K, Ca, Na, and Mg.

Methods	LOD (mg L^−1)				Reference
	K	Ca	Na	Mg
LCGD-AES	0.390	0.054	0.048	0.032	This work
ELCAD	0.200	0.400	0.060	0.800	[8]
Earlier	0.013	0.023	0.0008	0.019	[9]
SCGD	0.0006	0.45	0.0005	0.340	[10]
DC-APGD	0.004	0.36	0.002	0.1	[11]
DC-APGD	0.007	0.150	0.003	0.030	[12]
APGD	0.004	0.09	0.002	0.04	[13]
APGD	0.00085	0.25	0.00023	0.015	[14]