检测葡萄酒中可滴定总酸

智能文字提取功能测试中

Analysis And Testing Technology Application Application Use This method is used for the quantitative determination of total acidity in wine and most. The totalacidity is calculated as g/L tartaric acid. Appliances Titrator： TL 6000/7000(7750 (TL 6000/7000 M2/20) consists of Basic device Magnetic stirrer TM 235 20 mL Exchange unit WA 20， with brown glass bottle for titrant complete And pH combination electrode A 162 DIN ID Electrodes Electrode：A 162 DINID Calibration： DIN buffer pH= 4.00 and pH=7.00 Application Reagents Titrant： sodium hydroxide solution 0.1mol/l Soda lime for carbon dioxide uptake of the reagent. Titer： potassium hydrogen phthalate (reference substance) Description Calibration The pH combination electrode is calibrated in technical buffer pH=4.00 and pH= 7.00 or in DIN bufferpH= 4.01 and pH= 6.87. Example of the calibration documentation： Calibration Buffers used pH buffer 1： TEC 4.000 pH buffer 2： TEC 7.000 Measured values pH buffer 1： TEC 4.000 165.6 mV/23.4°C pH buffer 2： TEC 7.000 -11.2mV/23.0°C Calibration data Slope： 99.4 %/-58.8 mV/pH Zero point： pH 6.81 /-11.2 mV Temperature： 23.4°C (a) Date and time： 07.03.13/15：04 Determination of the exact concentration of the standard solution By carbon dioxide absorption from the air occurs in the sodium hydroxide solution of sodiumbicarbonate， which changes the pH of the titrant. To prevent this， a drying tube filled with soda lime isplaced on the reagent bottle. The exact concentration of the sodium hydroxide solution is determinedusing the standard potassium hydrogen phthalate. The potassium hydrogen phthalate is dried in theoven before the titer determination for 2 hours at 120°C and cooled in a desiccator. Implementation In a 50 mL beaker， 0.2 to 0.3g potassium hydrogen phthalate were weighed accurately and dissolvedin 30 mL of dist. water with stirring. It is titrated with 0.1 mol/l sodium hydroxide solution. Application Standardisation titration (result) GLP documentation Titration graph 'ml pH/ml · dpH/dml Method data Method name： Titre NaOH Titration duration： 2 m 15s End date： 08.01.13 End time： 15：46：03 Titration data Weight： 0.20490 g Start pH： pH 4.065 End pH： pH 9.667 Start temperature： 25.0 °℃(m) End temperature： 25.0°C(m) Zero point： pH 6.85/-8.9 mV Slope： 98.7%/-58.4 mV/pH EQ： 10.032 ml /pH 8.498 Titre： 0.1000 mol/I Mean value： RSD： Calculation formula Titre： (W*F2)/((EQ1-B)*M*F1)->WA Mol(M)： 204.22000Weight (W)： 0.2049 g (m) Factor2 (F2)： 1000.0000Blank value (B)： 0.0000 ml Factor 1 (F1)： 1.0000Statistics： Application Standardisation titration (method Method data Method name： Titer NaOH Created at： GLP Method type： Automatic titration Last modification： Measured value： pH Documentation： Titration mode： Dynamic Dynamic： average Measuring speed / drift： Noimal： E： minimum holding time： 02s maximum holding time： 1 15 s measuring time： 02 s drift： Initial waiting time： O s Titration direction： Increase Pretitration： Off Endvalue： 10.500 pH EQ： On slope value： Steep Value： 700 Dosing parameter 1/1 Application Titration of the sample . The sample is degassed by carefully boiling or purging with nitrogen. After the sample is cooled downto room temperature pipette accurately 10 ml in 50 ml beaker. Add app. 15-20 ml CO2 free water into and mix the sample on the magnetic stirrer for a few secondsTitrate with the NaOH titrant to a fixed pH endpoint 7.0. Example GLP documentation Titration graph 7.61 mlpH 7.000 " pH/ml Method data Method name：Total acidity in wineTitration duration：1m 56 sEnd date：12.07.13End time：10：07：16Titration dataSample ID：Pinot gris 2Pattern：10.000 mlStart pH：pH 3.426End pH：pH 7.054Start temperature：26.5℃ (m)End temperature：26.5°C (m)Zero point：pH 6.77/-13.3 mVSlope：98.2%/-58.1mV/pHEP1：7.613 ml/ pH 7.000TA：5.77 g/I Calculation formula TA： (EP1-B)*T*M*F1/(V*F2) Mol (M)： 75.00000 Blank value (B)： 0.0000 ml Titre (T)： 0.10100000(a) Factor 1 (F1)： 1.0000 Pattern (V)： 10.000 ml (m) Factor 2 (F2)： 1.0000 Statistics： Off Application Method parameters： Method data overall viewMethod name：Total acidity in wineCreated at： 07/12/13 9：49：58Method type：Automatic titrationLast modification： 07/12/1310：04：25Measured value：pHTitration mode：End pt.Documentation： GLPLinear steps：0.040 mlMeasuring speed / drift：Normal：minimum holding time： 02 smaximum holding time： 15 sMeasuring time： 02 sDrift： 20 mV/minInitial waiting time：0 sTitration direction：IncreasePretitration：OffEndpoint 1：pH 7.000delta endpoint 1： pH 1.000Endpoint delay 1： 5sEndpoint 2：OffDosingparameterDosing speed：50.00%Filling speed： 30 sMaximum dosing volume：50.00 mlUnit valuesUnit size：20mlUnit ID：10039117Reagent：NaOHBatch ID：no entryConcentration [mol/l]：0.10100Determined at：04/05/13 0：45：23Expire date：Opened/compounded：Test according ISO 8655：03/19/12Last modification：06/04/13 13：43：11 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 mTel.： 4008092068 昌Fax ： +86 (0)10 64390585 Web： www.julabo.cn， www.julabo-visco.com ( 优莱博技术(北京)有限公司 ) Seite von date： Seite von date：