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分析化学中使用的螯合剂,是那些能与金属离子形成螯合物,且伴随的物理化学变化可应用于分析化学的那些螯合形成剂。下面对实验室中使用最多的市售螯合剂按其用途分别加以说明。 1.比色试剂(吸光度试剂) 有些螯合剂在形成螯合物时其可见吸收光谱要发生较大的变化,这种螯合剂可作为比色试剂使用。吸收光谱的变化愈大,愈有可能用于高灵敏的比色分析。另外,螯合物的形成受
Chelating agents used in analytical chemistry are those chelating agents that form chelates with metal ions and the accompanying physicochemical changes are applicable to analytical chemistry. The most commonly used commercially available chelating agents in the laboratory are described below for their respective uses. 1. Colorimetric reagents (absorbance reagent) Some chelating agents in the formation of chelates visible absorption spectrum to be greater changes, this chelating agent can be used as a colorimetric reagent. The larger the change in absorption spectrum, the more likely it is to use highly sensitive colorimetric assays. In addition, chelate formation is affected