KF滴定原理(增加27-43)

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1、卡尔费休水份测定原理基础1Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.卡氏水份仪的应用领域石油化工行业药检制药日用化工检测机构涂料食品电力系统高分子材料……2Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.I2+SO2+2H2O2HI+H2SO43C5

2、H5N+H2O+I2+SO2→2[RNH]I+[RNH]SO3[RNH]SO3+CH3OH（无水）→[RNH]SO4CH3C5H5N不稳定，可与水反应加入CH3OH3卡尔费休反应原理Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.4I.CH3OH+SO2+RN[RNH]SO3CH3II.H2O+I2+[RNH]SO3CH3+2RN[RNH]SO4CH3+2[RNH]I(RN=有机碱)卡尔费休反应原理Ev

3、aluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.5有机碱二氧化硫SO2碘I2甲醇CH3OH参与KF反应的主要成分Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.6VS容量法库仑法KF测定的方法Evaluationonly.CreatedwithAspose.S

4、lidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.7试剂中碘的存在形式：I2容量法Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.预滴定将新鲜溶剂加入滴定池后预滴定目的：去除滴定体系中的水分-溶剂中的水(e.g.KFsolvents50–100ppm)-滴定池壁上附着的水-滴定池中的湿气过程：和样品滴定一样（至滴定终点）持续

5、时间：Volumetry容量法:1–10minCoulometry库仑法:5–20min结果：低且恒定的漂移值预滴定中的错误会影响样品水分检测结果！8Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.9步骤一：滴定度的测定用KF试剂中和滴定池中预存的水份在滴定池中加入工作介质加入已知含水量的标准物质滴定度（mg/ml）=m水/V消耗滴定剂Evaluationonly.CreatedwithAspose.Sli

6、desfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.10步骤二：样品水分的测定用KF试剂中和滴定池中预存的水份在滴定池中加入工作介质加入待测样品滴定样品中的水份Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.总结：容量法水分滴定程序11Evaluationonly.CreatedwithAspose.Slidesfor.NET3.

7、5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.试剂组成极性的活泼醇（甲醇）在醛酮分析中单组分试剂可选择其他醇Iodine碘Sulfurdioxide二氧化硫Base碱12容量法KF试剂Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.无吡啶Onecomponentreagents单组分试剂CombiTitrant滴定剂+CombiSolvent溶剂V

8、olumetry容量法Twocomponentrea