The present invention relates to a method for the determination of polyvalent metal ions using a sandwich aggregation assay. One or more chelating agents capable of forming at least 2:1 or higher ratio stoichiometry complexes with polyvalent metal ions are attached to a suitable carrier such as latex particles through covalent bonds or by non-covalent interactions, such as hydophobic interactions. Upon complexation with the metal ions, the carriers of the complexing agent aggregate, causing an increase in light absorbance or light scattering which is proportional to the concentration of metal ions in the test sample. The measurement of the light absorbance or light scattering by a suitable instrument, such as a spectrophotometer or nephelometer provides a means for measuring the concentration of metal ions.
本发明涉及一种使用夹心聚集测定法确定多价
金属离子的方法。一种或多种能够与多价
金属离子形成至少2:1或更高比例
化学配合物的
螯合剂通过共价键或非共价相互作用(如疏
水相互作用)连接到适当的载体上,例如乳胶颗粒。在与
金属离子形成配合物后,复合剂的载体聚集,导致光吸收或光散射增加,与测试样品中
金属离子的浓度成比例。通过适当的仪器(如分光光度计或浊度计)测量光吸收或光散射,提供了测量
金属离子浓度的手段。