检测碘价值

Analysis And Testing TechnologyApplication JulabooT： LVISCOAnalysis And Testing Technology Determination of lodinenumber Application Use The method describes the procedure for the determination of the iodine number with the use of a catalyst.The application is suitable for fats， fatty acids， oils and different organic solvents. Appliances Titrator： TL 6000/7000 (TL 6000/7000 M1/50) consists of Basic device Magnetic stirrer TM 235 50 mL exchange unit WA 50， with amber glass bottle for titrant complete Electrodes ● Electrode： Pt 62 or Pt 61， or Pt 62 RG with cable L 1 A Reagents Titration agent： Sodium thiosulphate solution (Na2S203) 0.1 mol/L Reaction solution： lodine monochloride 0.1 mol/L in glacial acetic acid Solvent： Glacial acetic acid， dist. water Catalyst solution： Magnesium acetate solution 3% Other reagents： Potassium iodine solution 10 % Description Preparation of Sodium thiosulfate solution 0.1 mol/L The 0.1 mol/L titrant are prepared form ampules.Ready to use titrants are also available and recommended.The solution should be stored in a dark place/bottle. Preparation of the lodine monochloride reaction solution 16.2 g iodine monochloride is dissolved in glacial acetic acid， and filled up to 1 liter with it. Preparation of the potassium iodine solution 25 g Kl are dissolved in dist. water filled up to 250 ml. It is recommended to prepare the solution freshlybefore use. Preparation of the Magnesium acetate solution 45 g Magnesium acetate are dissolved in glacial acetic acid and filled up to 1 liter with it. Application Titration The sample weight depends to the expected iodine number (please refer to the table). lodine no. g/100g smpl. amount [g] <5g 3 from 5 to 20 1 from 20 to 50 0.5 from 50 to 100 0.25 from 100 to 150 0.15 >150 0.1 Transfer the sample (weigh exactly to 0.0001 g) in an Erlenmeyer volumetric flask with stopper (if possibletake a 200 ml one). Add 20 ml glacial acetic acid， 25.00 ml reaction solution and 10 ml catalyst solution.Close the Erlenmeyer flask with a stopper， shake/mix the solution for some seconds and let the sample stayin darkness for 5 minutes. Add 15 ml of the Kl-solution and 50 ml dist water. Place the elektrode and burettetip in the sample and start the method (stirr very well). Carry out a blank titration without the sample in thesame matter. Electrode handling If not in use， the electrolyte should be stored in the electrolyte solution. For further details， please refer to theelectrode’s operating instructions. Application Methods Blank value (page 1)： GLP documentation Titration graph 45.87 ml243.1 mV Method data Calculation formula Blank： EQ1 -> M01 Statistics： Off Statistics： Off Application Blank value (page 2)： Method data overall viewMethod name：Iodine BlankCreated at： 05/08/1313：31：57Method type：Automatic titrationLast modification： 05/08/1314：15：22Measured value：mVDamping settings： NoneTitration mode：DynamicDocumentation： GLPDynamic：AverageMeasuring speed / drift：User-defined：minimum holding time： 03 smaximum holding time： 15 sMeasuring time： 03 sDrift： 10 mV/minInitial waiting time：0sTitration direction：DecreasePretitration：OffEnd value：OffEQ：On (1)Slope value：SteepValue： 700 Dosing parameter Dosing speed： 100.00% Filling speed： 30 s Maximum dosing volume： 50.00 ml Unit values Unit size： 50ml Unit ID： 10045135 Reagent： Natriumthiosulfat Batch ID： no entry Concentration [mol/l]： 0.10000 Determined at： 03/28/1317：23：03 Expire date： Opened/compounded： Test according ISO 8655： 03/14/13 Last modification： 03/28/1310：23：23 Application sample titration (page 1)： GLP documentation Titration graph ·mV/ml m ddmV/dml Method name： Iodine Number Titration duration： 3 m 10 s End date： 08.05.13 End time： 15：16：40 Titration data Sample ID： Olive oil Weight： 0.25540 g Start mV： 387.7 mV End mV： 232.3 mV EQ： 29.348 ml/ 262.8 mV Iodine Number： 82.14 Calculation formula Iodine Number： (B-EQ1)*T*M*F1/(W*F2) Mol (M)： 12.69000 Blank value (B)： 45.8800 ml (M01) Titre (T)： 0.10000000 (a) Factor 1 (F1)： 1.0000 Weight (W)： 0.25540 g (m) Factor 2 (F2)： 1.0000 Statistics： Off Application sample titration (page 2)： Method data overall view Method name：Iodine NumberCreated at： 05/08/13 13：33：02Method type：Automatic titrationLast modification： 05/08/13 15：01：16Measured value：mVDamping settings： NoneTitration mode：DynamicDocumentation： GLPDynamic：AverageMeasuring speed / drift：User-defined：minimum holding time： 03 smaximum holding time： 15 sMeasuring time： 03 sDrift： 10 mV/minInitial waiting time：0sTitration direction：DecreasePretitration：Endvalue：EQ：On (1)Slope value：User-definedValue： 350 Dosing parameter Dosing speed： 100.00% Filling speed： 30s Maximum dosing volume： 50.00 ml Unit values Unit size： 50ml Unit ID： 10045135 Reagent： Natriumthiosulfat Batch ID： no entry Concentration [mol/l]： 0.10000 Determined at： 03/28/1317：23：03 Expire date： Opened/compounded： Test according ISO 8655： 03/14/13 Last modification： 03/28/13 10：23：23 Application Hints lf you have any questions concerning the application， you are welcome to contact us. Literature JULABO TECHNOLOGY(Beijing)Co.，LTD地址：北京市朝阳区酒仙桥东路1号院M8号楼C厅3层301室 ： Room 301，C hall，M8 office building，No.1 jiuxianqiao east road ，Chaoyang District，Beijing，China Tel.：4008092068 昌Fax：+86 (0)10 64390585 E-Mail ： info@julabo.cn 优莱博技术(北京)有限公司 Web： -visco.com Page of Date： Date： age of