The feasibility and the range of concentration in the miniaturization experiment about the Fe2+content of the ferrous salt was studied through using adapted micro type burette.Keeping the basic operation,using F-test and t test,comparing with constants titration,when reagent consumption reduced to 1/5,the precision declined,but it can still basically meet the students' experiment requirement.The preferred concentration range for standard solution of K2Cr2O7 is 0.009 4~0.034 0 mol/L.% 借助改装的微量滴定管，考察了K2Cr2O7法测定亚铁盐样品中Fe2+实验微型化的可行性及较佳浓度范围．在不改变基本操作的前提下，借助F检验和t检验，通过与常量法比较发现，当试剂用量减少为常量法的1/5时，该实验的精密度有所下降，但仍能基本满足学生实验的要求．微量法所用K2Cr2O7标液的较佳浓度范围为0.0094~0.0340 mol/L．
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