High-Accuracy Determination of Potassium and Selenium in Human Serum by Two-Step Isotope Dilution ICPMS

Table 4

The data obtained from RELA 2018.

Lab code	A	e.u.A	B	e.u.B	Method
3	4.942	0.08	2.776	0.043	ICP-OES
24	4.9	0.05	2.8	0.04	FES
27	5.002	0.05	2.817	0.028	ICP-ID/SFMS
39	4.96	0.083	2.8	0.065	FES
51	4.96	0.038	2.788	0.028	ICPMS
54	4.995	0.044	2.812	0.028	ICPMS
63	4.95	0.05	2.78	0.03	FAAS
87	4.998	0.028	2.813	0.021	Ion chromatography
115	4.948	0.04	2.785	0.03	ID/ICPMS