Table 1.

Validation parameters in applied analytical methods of trace elements determinations.

Analyte	Isotope	Operating range [µg/L]	V R [%]	V r [%]	LOD [µg/l]	LOQ [µg/l]	U [%]	Recovery NIST 1643-e [%]
Mn	55	0.20–100	10.4	6.3	0.033	0.198	11.1	108.1
Co	59	0.01–100	4.6	4.6	0.002	0.012	10.0	109.6
Cu	65	0.38–100	5.8	3.5	0.064	0.384	12.4	96.1
Zn	66	2.50–100	11.4	7.6	0.181	1.086	14.6	80.3
Pb	208	0.21–100	13.9	11.3	0.036	0.216	18.0	105.7
Fe∗	—	0.30–5000	5.1	3.3	0.09	0.30	13.2	CRM NIES number 13 human hair 98.4

^∗Fe³⁺ determined by IC; LOD: limit of detection; LOQ: limit of quantification. V_R: relative standard deviation of reproducibility. V_r: relative standard deviation of repeatability. nd: no data in CRM certificate. U: expanded uncertainty.