而要形成螯合物其中有一个因素非常重要，就是金属离子周围必须有足够的原子与它产生配位。
One of the important factors to form chelate is there should be enough atoms to coordinate with metal ion.
在洗衣粉中掺入螯合剂，例如次氮基三乙酸酯(NTA)或者是乙二胺四乙酸酯(EDTA)，这些螯合剂易于形成水溶性的金属螯合物。
A chelating agent which forms an easily water-soluble metal chelated compound such as nitrilotriacetate (NTA) or ethylene diamine tetraacetate (EDTA) is incorporated in a detergent composition.
黄芩苷降低肝铁水平可能的原因，是和铁形成螯合物后排泄出体外。
The possible reason of baicalin reducing liver iron was to form baicalin-iron complex and excrete from body.
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