Table 1.

Results (mg kg⁻¹ dry biomass) of the measurements of accuracy of the analytical data using certificate reference materials CRM 279 Ulva lactuca (sea lettuce), SRM (fish flour), and MA-B-#/TM (lyophilized muscle tissue)

Element	Declared value	Own result	RSD (%)	Recovery (%)
Cda	0.274 ± 0.022	0.232 ± 0.024	10.3	84.7
Cua	13.14 ± 0.37	13.09 ± 0.23	1.65	99.6
Pba	13.48 ± 0.36	13.10 ± 0.98	7.48	97.2
Zna	51.30 ± 1.20	50.24 ± 1.59	3.16	97.9
Hgb	0.21 ± 0.02	0.26 ± 0.03	11.5	123.8
Fec	95.4	92.5 ± 3.1	3.37	97.0
Mnc	2.62	2.39 ± 0.09	3.76	91.2
Cac	3490	3456 ± 70	2.02	99.0
Mgc	1130	1040 ± 39	3.71	92.0
Nac	2160	1776 ± 53	2.97	82.2
Kc	9320	9855 ± 452	4.59	105.7

^aCRM 279 Ulva lactuca (sea lettuce)

^bSRM (fish flour)

^cMA-B-#/TM (lyophilized muscle tissue)