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应用碱性染料的萃取光度法,具有较高的灵敏度和选择性,已为分析工作者所熟知。在碱性染料中,三苯甲烷染料是研究和应用得较早和较多的一种,如早在40年代就有人研究过甲基紫和锑的显色反应。迄今,用作显色剂的这类染料已有10余种,如品红、甲基紫、结晶紫、孔雀绿、亮绿、碘绿等等,并已建立了数百种测定各种元素的萃取光度法。乙基紫亦属这类染料之一,它最早是在1963～1964年由我们和日本学者首次应用于萃取光度法以测定锑、铊
The use of alkaline dye extraction spectrophotometry, with high sensitivity and selectivity, has been well-known to analysts. Among the basic dyes, triphenylmethane dyes have been studied and applied earlier and more. For example, the color reaction of methyl violet and antimony has been studied as early as the 1940s. To date, more than 10 such dyes have been used as color developers, such as magenta, methyl violet, crystal violet, malachite green, brilliant green, iodine green, and the like, and hundreds of such elements have been established Extraction spectrophotometry. Ethyl Violet is also one of such dyes, it was first used by us and Japanese scholars from 1963 to 1964 for the first time extraction spectrophotometry to determine the antimony, thallium