检测银含量

Julabo.VISCOAnalysis And Testing TechnologyApplication Application Use Potentiometric determination of silver in silver or alloys. After dissolving in concentrated nitric acid thesample is titrated with NaCl (or KBr) or HCI using a silver combination electrode. Appliances Titrator： TL 6000/7000/7750 Basic device Magnetic stirrer TM 235 20 exchange unit WA 20， with brown glass bottle for titrant complete Electrodes ● Silver combination electrode Ag CI 62 or AgCI 62 RG Electrolyte KNO3 2 mol/， L 2114 (only for AgCl 62) Electrode cable L 1 A Reagents Titrant： NaCI， KCI or HCI 0. Mol/l Titer： possible with AgNO3 titrant solution 0.1 mol/l Other reagent is nitric acid 65% Description Determination of the exact concentration of the titration (option) Ready to use titrant solutions are recommended. Also possible is the use of ampules. The titrantsolution can be standardised using 10 ml or 15 ml volumes of AgNO3 0.1 mol/l titrant. For a standard titration pipette 10 -20 ml of the Ag-standard in a 150 ml beaker， add appr. 80 ml destwater and 1 ml HNO3 (not necessary for HCI titrant). Place the electrode and burette tip in the sampleand start the method. The titration should stops at the equivalence point. The titration consumption(EQ) should be between 10 -20 ml. Titration of the sample Connect the Ag type electrode with the electrode cable at the electrode plug of the TL alpha plus. Donot forget to open the refilling hole of the electrode (only AgCl 62). Weigh between 180 - 200 mg of the silver sample in a 250 ml glass beaker and add 30 ml of the nitricacid.. Head up the sample with a burner or a heater to dissolve the silver. Dilute the dissolved samplewith appr. 100 dest. water. Place the electrode and burette tip in the sample and press the“START”key. The titration stops at the equivalence point. Application Result example： GLP documentation Titration graph · mV/ml -dmV/dml Calculation formula Silber： (EQ1-B)*T*M*F1/(W*F2) Mol (M)： 107.86800 Device information Device： TitroLine 7000 Serial number： 10003645 Software version： 1230k Silber_in_%_12_10_12-16_47_19.pdf 1/2 Application Method The method parameter are very similar to the default method“chloride in %". Only the name andmolecular weight have to be changed. Method data overall view Method name： Silber in % Created at： Method type： Automatic titration Last modification： Measured value： mV Damping settings： None Titration mode： Dynamic Documentation： GLP Dynamic： Steep Measuring speed / drift： User-defined： minimum holding time： 04s maximum holding time： 15 s Measuring time： 03 s Drift： Initial waiting time： 0s Titration direction： Decrease Pretitration： End value： EQ： On (1) Slope value： Steep Value： 700 Dosing parameter Dosing speed： 100 % Filling speed： 30 s Maximum dosing volume： 20.00 ml Unit values Unit size： 20ml Unit ID： 10039005 Reagent： HCl 0.1 mol/L Batch ID： no Charge Concentration [mol/]： 0.10010 Determined at： 12/05/11 19：18：45 Expire date： 08/18/12 Opened/compounded： 09/10/11 Test according ISO 8655： 05/10/11 Last modification： 09/13/1214：39：31 Device information Device： TitroLine 7000 Serial number： 10003645 Software version： 1230k Silber_in_%_12_10_12-16_47_19.pdf 2/2 Application Notes If you have any questions on the application， you can feel free to contact us.. 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 Add ：Room 301，C hall，M8 office building，No.1 jiuxianqiao east road ，Chaoyang District，Beijing，China Tel.：4008092068 昌Fax： +86(0)10 64390585 品E-Mail ： info@julabo.cn ③Web： -visco.com 优莱博技术(北京)有限公司 Seite von date： date： eite von