混凝土中氯离子含量检测方案(自动电位滴定)

混凝土中氯离子含量的测定 应用资料硬化混凝土中氯离子(Cl-)的测定，采用氯离子选择性电极和硫酸汞参比电极进行电位滴定测定，参照GB/T 8077, GB/T 50344 标准的试验方法。在样品中加入2mol/L硝酸和30%过氧化氢溶液后，冷却至室温，再加入0.005mol/L氯化钠。用0.005mol/L硝酸银滴定至滴定曲线上的最大拐点为终点。根据硝酸银的滴定体积计算出氯离子。TIK-00112enLK-MKYOTO ELECTRONICSMANUFACTURING CO.，LTD. Application MemoChlorine Ion in Concrete Industry Ores Instrument Automatic potentiometric titrator Measurement method Precipitation titration Standards Japan Concrete Institute JCI-SC5，JCI-SC6， GB/T 8077， GB/T 50344 1.Overview Quantification of chlorine ion (C1) in hardened concrete is determined by potentiometrictitration using the chlorine ion selective electrode and the mercury sulfate reference electrode，referring to the test methods of the above standards. After 2mol/L nitric acid and 30%hydrogen peroxide solution are added to the sample， leave it to cool to room temperature， andadd 0.005mol/L sodium chloride. Titrate with 0.005mol/L silver nitrate up to the endpoint，which is the maximum inflexion point on the titration curve. The chlorine ion is calculatedfrom the titration volume of silver nitrate. 2. Apparatus Main unit Automatic potentiometric titrator (preamplifier STD) Electrode Chlorine ion selective electrode Mercury sulfate reference electrode 3. Reagents Titrant 0.005mol/L silver nitrate solution Solvent Pure water Additive 2mol/L nitric acid， 30% hydrogen peroxide， 0.005mol/L sodium chloride solution 4. Example —Measurement results一 Sample Titer Chlorine ion (g) (mL) (ppm) 1 2.0167 11.9358 605.46 2 2.0119 11.9718 610.10 3 2.0089 11.9196 606.37 Average 607.31 SD 2.46 RSD(%) 0.404 —Titration curve— Please feel free to contact us for any further information. Kyoto Electronics Manufacturing Co.， Ltd. Overseas Sales & Marketing Sect. 京都电子工业株式会社-可睦电子(上海)商贸有限公司 上海市徐汇区宜山路333号1201室 电话：021-54488867 电邮： kemu-kem@163.com 网址： http：//www.kem-china.com