描述
Zirconium is a chemical element with the symbol Zr, atomic number 40 and atomic mass of 91.224. Zirconium forms a variety of inorganic and organometallic compounds such as zirconium dioxide and zirconocene dichloride, respectively. Five isotopes occur naturally, three of which are stable. Zirconium compounds have no biological role and are of low toxicity. The human body contains, on average, only 1 milligram of zirconium, and daily intake is approximately 50 ug per day. Zirconium content in human blood is as low as 10 parts per billion. Aquatic plants readily take up soluble zirconium, but it is rare in land plants. Seventy percent of plants have no detectable zirconium content, and those that do have as little as 5 parts per billion. [Wikipedia]. Zirconium is found in many foods, some of which are european plum, parsley, carrot, and endive.