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近年来,螯合树脂作为富集、分离的一种方法已在分析领域里逐渐被采用。而将螯合树脂在富集离子后,直接测定有色树脂吸光度的方法也有所见。例如Yoshimura等人就利用富集离子后的有色树脂直接进行光度测定;大关邦夫等人将富集离子后的有色树脂过滤涂于透明的纸上进行光度测定。这种将树脂富集被测离子后直接进行光度测定的方法称为离子交换光度法。其主要特点是将富集手段和分析方法结合起来;它的灵敏度比同样的试剂进行光度测定提高10～100倍。但也存在一定的问题。如对一毫米比色杯的吸光性能的要求较高;特别是对树脂填装比色皿或涂层的技术要求也较高,较严格。为此,我们提出了“树脂悬浮光度测定法”,即将富集离子后的有色树脂悬浮在甘油中,
In recent years, as a method of enriching and separating chelate resin, it has been gradually adopted in the field of analysis. However, the method of directly measuring the absorbance of the colored resin after the chelating resin is enriched in ions is also seen. For example, Yoshimura and others on the use of ion-rich colored resin direct photometric determination; Daofu Bangfu and others enrich the ion-rich colored resin coated on transparent paper photometric determination. This resin enrichment of the measured ions directly after the photometric method is called ion exchange spectrophotometry. Its main feature is the combination of enrichment and analytical methods; its sensitivity is 10 to 100 times greater than that of the same reagent. But there are also some problems. Such as the one millimeter cuvettes absorb higher performance requirements; especially for resin filling cuvettes or coating of the technical requirements are higher, more stringent. To this end, we propose a “resin suspension photometric method”, that is, the ion-rich colored resin suspension in glycerol,