石油产品中水分含量检测方案

Application Julobo7viscoAnalysis And Testing Technology Application Use The application describes the procedure of the coulometric water determination in petrochemistry productssuch as mineral oil and similar products. The application note describes only the direct titration and not theuse of evaporation oven. Appliances Titrator： TitroLine 7500 KF trace M1 -4 Appliances TitroLine 7500 KF trace M1 -4 Electrodes with diaphragm (TZ 1753) or without diaphragm (TZ 1752) Generating electrode： Reagents Reagents Use with diaphragm (TZ 1753)： Anolyt： Recommended from Sigma Aldrich： 70 ml HYDRANAL-Coulomat A + 30 ml Chloroform or 70 ml HYDRANAL-Coulomat Oil. Merck： CombibiCoulomat frit + additional solvent Catholyt Hydranal Coulomat CG for Hydranal reagents； CombiCoulomat frit for Merck Additional solvent The addition of up to 30 % to the anolyt of a long chain alcohol such as decanol or octanol or chloroform is recommended for Merck combicoulomat. Use without diaphragm (TZ 1752)： Reagent： Recommended is from Sigma Aldrich： Hydranal Coulomat AG-H， from Merck CombiCoulomat fritless Additional solvent The addition of up to 20 % to the reagent of a long chain alcohol such as decanol or octanol is recommended (not needed for Hydranal AG-H). Standard Standards are available from Merck and Sigma Aldrich. Recommended are the standards with lower concentration of 0.01 Description Set up the unit and fill the reagents as described in the operating manual. Switch on the instrument and waituntil the drift is < 10 ug/min and stable. For M3 and M4 (generator electrode with diaphragm) it talessometimes several hours to get a low drift value. Standard and sample Titration Before you start the sample titration it is recommended to run some tests with a water standard. Standardswith certificat in ampoules are recommended instead of pure water. Standard： Open the ampoule . Use a suitable plastic or glass syringe. Depended on the standard use a needle with a diameterbetween 0.8 mm and 1.0 mm (oil standard) and a length of minimum 70 mm. ● First rinse the syringe 1-2 times with 1 ml each of the standard then draw up slowly the entireampoule content in the syringe without air-bubbles. ● Place a 100 ml glass beaker (tall form) on a balance， put the syringe inside and weigh it. Press tara Press the start button on the TL 7500 KF trace Inject about 0，75-1，5 ml of the standard into the titration vessel ● Place the syringe inside the glass baker on the balance and read the exact weight from thedisplay/or press the print button for automatic transfer. Enter sample ID and sample weight. The titration starts automatically. . Repeat the determination 2 -3 times. GLP-Dokumentation Titrationsdiagramm ppm/s Methodendaten Methodenname： Water in ppm Titrationsdauer： 1 m 42 s Enddatum： 21.03.13 Endzeit： 11：24：16 Titrationsdaten Proben ID： Standard 0.1 Einwaage： 3.51320 g Startdrift： 2.8 pg/min Enddrift： 4.5 pg/min Wasser： 343.899 pg Result： 97.9 ppm Mittelwert： 98.1 ppm rel. STABW： 0.9 % Sample： Open the sample container Use a suitable plastic or glass syringe. Depended on the sample use a needle with a diameterbetween 0.9 mm and 1.5 mm. First rinse the syringe 1-2 times with the sample and then then draw up slowly the sample in thesyringe without air-bubbles. Place a 100 ml glass beaker (tall form) on a balance， put the syringe inside and weigh it. Press tara ● Press the start button on the TL 7500 KF trace Inject about 1 -2 ml of the sample into the titration vessel Place the syringe inside the glass baker on the balance and read the exact weight from thedisplay/or press the print button for automatic transfer. Enter sample ID and sample weight. The titration starts automatically. Note：If the sample is not homogenous it has to be homogenised before. GLP-Dokumentation Titrationsdiagramm "ppm/s Methodendaten 26.6 ppm Application Method Method data Method name： Water in ppm Created at： 04/29/138：35：39 Method type： Automatic titration Last modification： 05/03/1314：15：33 Documentation： GLP Start drift： 10.0 pg/min Stop drift (delta)： 2.0 pg/min Stop drift tolerance： 0.02 ug/min2 Stop delay time： 5 s Min. titration time： 60 s Max. titration time： 600 s Working point： 300 mV Control factor： 4 Calculation formula Water： pg*M*F1/(F2*W) Mol (M)： 1.00000 Unit： ppm Decimal places： Factor 1 (F1)： 1.0000 Factor 2 (F2)： 1.0000 Weight (W)： man Statistics： Off Device information Device： TitroLine 7500 KF trace Serial number： 10047704 Software version： 1312t mth_Water_in_ppm_06_05_13-14_29_29.pdf 1/1 Hints If you have any questions concerning the application， you are welcome 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，ChinaTel.：4008092068昌Fax： +86(0)10 64390585品E-Mail ： info@julabo.cn ③Web： www.julabo.cn，www.julabo-visco.com 优莱博技术(北京)有限公司 Page of Date： Page of Date：