某些玻璃中含有氯、溴等元素,而他们的含量影响到玻璃的某些性能,但未曾见到玻璃中氯、溴的分析方法。我们根据在微酸性溶液中高锰酸钾可将溴离子氧化成元素溴而氯不被氧化的原理,用四氯化碳将元素溴萃取到有机相与氯分离,再以高铁-硫氰酸汞法比色测定溴,15—80微克溴/25毫升符合比尔定律;同时另取一份 Some glass contains elements such as chlorine and bromine, and their content affects some properties of the glass, but no glass or bromine analysis methods have been found. Based on the principle that potassium permanganate can oxidize bromine ions to elemental bromine in a slightly acidic solution and chlorine is not oxidized, elemental bromine is extracted with carbon tetrachloride to separate the organic phase from the chlorine, and then the high-speed iron-mercury thiocyanate Fluorometric determination of bromine, 15-80 micrograms of bromine / 25 ml Beer’s law is obeyed;