. 2018 Feb 23;8:3578. doi: 10.1038/s41598-018-21732-z

Table 4.

The levels of elements in seaweed from different origins.

Seaweeds	Area	Levels of elements (mean ± SD) mg/kg
Seaweeds	Area	Al	As	Cd	Cr	Cu	Hg	Mn	Ni	Pb	Se
Brown	1	810.3 ± 65.8^a	25.78 ± 7.06	0.217 ± 0.100^b	2.7 ± 0.964	1.255 ± 0.370^abc	0.087 ± 0.063^a	21.13 ± 8.60^ab	1.028 ± 0.600	0.741 ± 0.282	0.329 ± 0.104^a
	2	1072 ± 207.4^b	30.5 ± 13.4	0.158 ± 0.086^b	1.774 ± 0.773	1.413 ± 0.720^ab	0.041 ± 0.017^b	27.13 ± 13.8^a	1.031 ± 0.549	0.532 ± 0.422	0.583 ± 0.286^a
	3	729.6 ± 264.1^a	27.54 ± 7.70	0.480 ± 0.134^a	3.061 ± 1.982	1.998 ± 0.418^a	0.059 ± 0.019^ab	23.93 ± 9.62^ab	1.023 ± 0.527	0.536 ± 0.187	0.217 ± 0.093^a
	4	394.4 ± 55.6^c	25.36 ± 12.74	0.117 ± 0.085^b	2.977 ± 1.062	1.099 ± 0.782^bc	0.029 ± 0.030^b	11.30 ± 9.38^bc	1.392 ± 1.272	0.543 ± 0.298	1.533 ± 1.299^b
Red	1	260.7 ± 60.4^a	12.44 ± 4.76^B	1.942 ± 0.983	5.493 ± 1.537	5.161 ± 3.280^B	0.008 ± 0.005	17.00 ± 4.88^B	1.156 ± 1.022	0.764 ± 0.202^AB	0.073 ± 0.132
	2	523.7 ± 78.5^b	27.48 ± 9.04 ^A	2.426 ± 1.588	2.419 ± 1.356	13.418 ± 6.077^AB	0.017 ± 0.029	44.44 ± 16.47 ^A	1.646 ± 0.847	0.670 ± 0.345^B	0.226 ± 0.086
	3	621.9 ± 188.9^b	29.62 ± 4.55^AB	3.076 ± 1.306	6.846 ± 1.892	21.940 ± 2.907 ^A	0.009 ± 0.003	46.36 ± 15.50 ^A	2.138 ± 1.256	1.186 ± 0.727 ^A	0.127 ± 0.033
	4	522.0 ± 102.3^b	22.74 ± 10.30^AB	2.227 ± 1.220	2.543 ± 1.298	10.524 ± 6.955^B	0.008 ± 0.008	46.56 ± 25.6 ^A	1.952 ± 1.790	0.603 ± 0.432^B	0.548 ± 0.537
Combine	1	590.4 ± 113.9^a	20.86 ± 9.04	3.729 ± 1.209	0.853 ± 0.314	2.694 ± 1.589	0.062 ± 0.064^×	19.61 ± 7.57	1.075 ± 0.756	0.750 ± 0.248^xy	0.235 ± 0.169^×
	2	715.6 ± 126.1^b	29.06 ± 11.41	2.084 ± 1.006	1.292 ± 0.867	7.129 ± 2.356	0.030 ± 0.026^yz	35.37 ± 17.21	1.327 ± 0.762	0.618 ± 0.376^xy	0.413 ± 0.279^×
	3	663.3 ± 129.7^b	28.23 ± 6.71	4.323 ± 1.025	1.345 ± 0.495	8.645 ± 2.705	0.042 ± 0.029^xy	31.41 ± 15.75	1.395 ± 0.962	0.926 ± 0.654^×	0.187 ± 0.088^×
	4	481.9 ± 96.2^a	23.67 ± 11.16	2.697 ± 1.247	1.509 ± 0.660	6.366 ± 2.663	0.016 ± 0.021^z	31.01 ± 42.42	1.754 ± 1.634	0.583 ± 0.391^y	0.982 ± 1.058^y

a,b,c,A,B,C,x,y and z mean data with upper letters where do not share one same alphabet shows that there are significant differences among areas by One-way ANOVA and Tukey HSD multiple comparisons (P<0.05).