At the same time, the Porphyra samples contain the rich inorganic microelements and the contents of harmful elements including Pb and Cd are lower.It implied that nutritive value of Porphyra is high.

• 测定结果表明：紫菜中含有丰富的人体必需的微量元素，而铅、镉等有害元素含量很低，作为食用蔬菜对人体补充微量元素有较高的利用价值。