银的测定方法很多,而分光光度法大多需经有机试剂萃取后显色。如双硫腙—四氯化碳法、铜—铜试剂—苯萃取法等。溴邻苯三酚红—邻菲啰啉—银三元络合物法,虽在水溶液中显色,但稳定性较差,干扰离子多,灵敏度也较低。在资料的启示下,本文研究了银碘络阴离子与碱性染料罗丹明B离子缔合物的 Determination of silver many ways, and most of the spectrophotometric extraction of organic reagents by color. Such as dithizone - carbon tetrachloride method, copper - copper reagent - benzene extraction and so on. Bromopyrogallol red - phenanthroline - silver ternary complex method, although the color in aqueous solution, but less stable, more interference ions, and lower sensitivity. Inspired by the data, this paper studies the silver iodide anion and basic dye rhodamine B ion association