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微量溴的测定方法一般是此较复杂的,特别是在卤素离子共存时,例如食盐这样典型试样中微量溴的测定方法的研究,更具有很大的实际价值和理论意义。溴离子本身没有特效反应,它的定性检出和定量测定都是利用溴离子的氧化还原品性,例如容量法测定溴离子时就是先用次氯酸盐把它氧化成次溴酸盐,然后用定碘法进行测定。这个方法很难避免其他具氧化或还原性物质的干扰,而且容量方法旣使选用0.01N标准溶液,当分析1‰以下含溴量的试样时,其误差也是相当大的。
Determination of trace bromine is generally more complicated, especially in the coexistence of halogen ions, such as salt, a typical sample of bromine in the determination of the method of research, more of great practical value and theoretical significance. Bromide itself has no specific reaction, its qualitative detection and quantitative determination of the use of bromine redox properties, such as the capacity of bromine ion is first hypochlorite it is oxidized to hypobromite, and then Determination by iodine method. This method is difficult to avoid other interference with oxidizing or reducing substances, and the capacity of the method used to choose 0.01N standard solution, when the analysis of 1 ‰ below the sample containing bromine, the error is quite large.