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 4

t-test and p values between the analytical results obtained by LCGD-AES and IC.

Elements	Sample
	A	B	C	D
	() values
K	40.90 ()	443.57 ()	15.73 ()	832.08 ()
Ca	1.71 (0.09)	3.22 (0.02)	1.77 (0.62)	1.52 (0.10)
Na	2.28 (0.23)	1.01 (0.15)	0.29 (0.11)	1.03 (0.25)
Mg	1.61 (0.05)	2.22 (0.11)	9.26 (0.01)	5.55 (0.01)

values of t_95%> 2.78 (with a confidence interval of 95%) and indicated that there was a significant difference between IC and LCGD-AES.