几十年来,已经知道活组织中可找到许多元素,但其准确含量,直到最近还不清楚.由于这些元素,被认为是“极少量—痕量”存在,因而引出“微量元素”的名称.虽然用现代技术几乎可将所有微量元素相当准确地测出,但“微量元素”之称仍为人们普遍使用.近廿年,微量元素的研究有了明显进展.虽然人体缺少铁和碘引起的疾病已知道多年,但近来才认识到锌和铜乃人类的代谢和营养所必需.35年前,碳酸酐酶被认为是唯一需要锌的酶,但现在已知约 It has been known for decades that many elements can be found in a living tissue but its exact content has not been known until recently because these elements, which are considered to be present in a “very small amount of trace” “Although the use of modern technology can be almost all the trace elements measured fairly accurately, but ” trace elements "is still commonly used as the name of the past 20 years, significant progress in the study of trace elements.Although the human body The lack of iron and iodine-related diseases is known for many years, but zinc and copper have recently become known to be essential for human metabolism and nutrition. Carbonic anhydrase was considered the only enzyme that required zinc 35 years ago, but it is now known that about