Table 1.

Multielemental composition of raw algal biomass and extracts obtained by boiling and soaking in water.

Element	Baltic seaweeds (mg/kg d.m.) (N = 3)	EB (N = 3)	ES (N = 3)	Extract obtained by boiling (45 min, 60°C) Ulva reticulata	Extract obtained by boiling Ulva lactuca	Extract obtained by MAE 25°C	Extract obtained by MAE 40°C	Extract obtained by MAE 60°C
				[34]	[35]	[25]
	mg/L
Macroelements
Ca	40292 ± 8058	333 ± 50	410 ± 61	158	—	354 ± 53	363 ± 54	365 ± 54
K	5082 ± 1016	969 ± 145	978 ± 147	175	0.980	868 ± 130	901 ± 135	951 ± 142
Mg	3181 ± 636	300 ± 45	357 ± 54	108	9.28	303 ± 45	311 ± 46	322 ± 48
Na	6354 ± 1271	1239 ± 248	1302 ± 260	295	5.04	1050 ± 211	1200 ± 240	1250 ± 250
P	1155 ± 231	34.7 ± 5.2	5.22 ± 0.78	—	—	9.52 ± 1.43	18.3 ± 2.7	32.9 ± 4.9
S	8614 ± 1723	670 ± 100	599 ± 90	—	—	562 ± 84	582 ± 87	702 ± 105
Microelements
B	97.8 ± 14.7	6.50 ± 0.97	2.62 ± 0.39	—	—	3.30 ± 0.5	3.44 ± 0.51	4.74 ± 0.71
Co	2.84 ± 0.43	0.0100 ± 0.0025	0.0100 ± 0.0025	—	0.201	0.012 ± 0.003	0.012 ± 0.003	0.0135 ± 0.0034
Cu	12.7 ± 1.9	0.140 ± 0.021	0.0200 ± 0.005	1.15	3.02	0.117 ± 0.0117	0.148 ± 0.022	0.108 ± 0.016
Fe	6660 ± 1332	2.53 ± 0.38	17.6 ± 2.6	5.22	0.417	1.19 ± 0.2	2.17 ± 0.3	4.47 ± 0.70
Mn	232 ± 35	2.43 ± 0.36	3.71 ± 0.56	—	0.050	2.52 ± 0.37	2.62 ± 0.39	3.07 ± 0.46
Mo	0.310 ± 0.046	0.0200 ± 0.005	0.000	—	—	0.001 ± 0.000	0.179 ± 0.026	0.0108 ± 0.0027
Ni	5.23 ± 0.78	0.130 ± 0.019	0.120 ± 0.018	—	—	0.108 ± 0.016	0.111 ± 0.016	0.132 ± 0.019
Si	907 ± 136	9.10 ± 1.36	9.73 ± 1.46	—	—	3.10 ± 0.46	6.69 ± 1	11.9 ± 1.8
Zn	64.9 ± 9.7	0.240 ± 0.036	0.100 ± 0.015	1.25	1.02	0.0746 ± 0.0112	0.201 ± 0.03	0.169 ± 0.025
Toxic metals
As	3.90 ± 0.507	0.170 ± 0.022	0.160 ± 0.021	—	—	0.246 ± 0.032	0.150 ± 0.019	0.198 ± 0.025
Cd	0.710 ± 0.092	<LLD	<LLD	—	—	<LLD	0.001 ± 0.000	0.001 ± 0.000
Pb	7.03 ± 0.91	0.0400 ± 0.008	0.0100 ± 0.0025	—	—	0.0098 ± 0.002	0.0104 ± 0.0021	0.032 ± 0.006

<LLD: below limit of detection.