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研究了铁（Ⅲ）和钼（Ⅵ）与邻苯二酚在ｐＨ ６．２０ 微酸性介质中反应生成的有色配合物与７１７型强碱性阴离子交换树脂的交换吸附，探讨了树脂相分光光度法同时测定铁（Ⅲ）和钼（Ⅵ）的实验条件。铁（Ⅲ）和钼（Ⅵ）树脂相有色配合物的最大吸收波长分别为５２０ ｎｍ 和４００ ｎｍ ，表观摩尔吸光系数ε为４．１×１０４ Ｌ／（ｍ ｏｌ·ｃｍ ）和９．０×１０４ Ｌ／（ｍ ｏｌ·ｃｍ ），符合Ｂｅｅｒ定律的范围为０～２．２ ｍ ｇ·Ｌ－ １和０～１．６ ｍ ｇ·Ｌ－ １。此法用于地下水中微量铁和钼的测定，相对标准偏差为３．３ ％ 和３．２ ％ 。
The exchange adsorption of iron (Ⅲ) and molybdenum (Ⅵ) with catechol in a slightly acidic pH 6.20 medium was studied. The exchange adsorption of 717 strongly basic anion exchange resin was studied. The effects of resin phase spectrophotometry Simultaneous Determination of Iron (Ⅲ) and Molybdenum (Ⅵ) in Experimental Conditions. The maximum absorption wavelengths of colored complexes of iron (Ⅲ) and molybdenum (Ⅵ) resin were 520 nm and 400 nm, respectively, and the apparent molar absorptivity ε was 4.1 × 104 L / (mol · cm) and 9.0 × 104 L / (m ol · cm). Beer’s law is in the range of 0-2.2 m g · L -1 and 0-1.6 m g · L -1. This method is used for the determination of trace amounts of iron and molybdenum in groundwater with relative standard deviations of 3.3% and 3.2%.