重金属盐的种类有哪些？
重金属盐种类繁多，其中包括醋酸铅、氯化汞、硫酸铜、硝酸等。所谓重金属，通常是指密度大于4.5克每立方厘米的金属，其相对原子质量一般大于55。例如，铁的相对原子质量为56，因此也属于重金属的范畴。
在食盐的范畴内，我们通常所说的食盐是指海盐、井盐、矿盐、湖盐、土盐等多种来源的盐类。这些食盐的主要成分是氯化钠，根据国家规定，井盐和矿盐的氯化钠含量不得低于95%。然而，食盐中也可能含有钡盐、氯化物、镁、铅、砷、锌、硫酸盐等杂质，易币付电脑版。例如，我们规定食盐中的钡含量不得超过20毫克每千克。此外，食盐中镁、钙含量过多会导致盐带有苦味，而氟含量过高则可能引起中毒。
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