环境水中物理指标检测方案

Julgbo VISCOAnalysis And Testing Technology Application Determination of Alkalinity(Carbonate and Bicarbonatehardness) Application Use The alkalinity of water is a measure of its capacity to neutralise acids. The alkalinity of natural water isdue to the salts of carbonate， bicarbonate， borates， silicates and phosphates along with the hydroxylions in free state. However the major portion of the alkalinity in natural waters is caused by hydroxide，carbonate and bicarbonates with may be ranked in order of their association with high pHvalues.Alkalinity values provide guidance in applying proper doses of chemicals in water and waste watertreatment processes， particularly in coagulation and softening. The alkalinity of water (formerly also referred to as ，，p value“ and，，m value" or acid consumption) isdefined as the consumption of hydronium ions up to pH 8.3 and pH 4.5. The results can be expressedas mg/L CaCO3，mmol/l°dH (Grad deutsche Harte/German hardness degree) and other units. The Alkalinity method is stored as default method inside the TitroLine6000/7000/7750 titrators Appliances Titrator： TL 6000-M2/20 or TL 7000-M2/20 consists of Basic device Magnetic stirrer TM 235 20 mL exchange unit WA 20， with brown glass bottle for titrant complete pH combination electrode with integrated temperature sensor (A 162 2M-DIN-ID， N 1052 A，BL 18...) Electrodes see above Calibration： DIN buffer pH= 4.00 and pH= 7.00 Application Reagents Titrant： HSOa or HCI 0.01 - 0.1 mol/l Titer： Possible with TRIS (Tris (hydroxymethyl)-aminomethan) 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 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 (option) The exact concentration of the titrant can be determined using aa titrimetric standard Tris(hydroxymethyl)-aminomethan. TRIS is dried in a desiccator overnight at room temperature before thetiter determination is carried out. The standard method for HCI/H2SO4 titrant (“titer HCl) is stored as a default method inside theTitroLineQ 6000/7000/7750 titrators. With EDIT/F3-Default method you can load this method. It isonly necessary to change the name of the method： Factor 2 (F2)： 1000.0000 Factor 1 (F1)： 1.0000 The factor 1 (F1) should be changed to 2 if as titrant 0.05 mol/IH2SO4 is usedIn a 100 or 150 ml， 0.2 to 0.3g TRIS are weighed accurately and dissolved in 60/80 mL of dist. waterwith stirring. Application Documentation example for standard titration of H2SO4/HCI with TRIS GLP documentation Titration graph pH/ml ·dpH/dml Method data Calculation formulaTitre：(W*F2)/((EQ1-B)*M*F1)-> M103Mol (M)：121.14000Weight(W)：manFactor 2 (F2)：1000.0000Blank value (B)：0.0000 mlFactor 1 (F1)：1.0000Statistics：off Application Method for standard titration of H2SO4/HCI with TRIS Method data overall view Method name： Titre HCI Created at： Method type： Automatic titration Last modification： Measured value： pH Damping settings： None Titration mode： Dynamic Documentation： GLP Dynamic： Steep Measuring speed / drift： Normal： minimum holding time： 02 s maximum holding time： 15 s Measuring time： 02 s Drift： 20 mV/min Initial waiting time： 0 s Titration direction： Decrease Pretitration： Off End value： 2.500 pH EQ： On(1) Slope value： Steep Value： 700 Dosing parameter Dosing speed： 100% Filling speed： 30 s Maximum dosing volume： 50.00 ml Unit values Unit size： 20ml Unit ID： 10039005 Reagent： HCl 0.1 mol/L Batch ID： no Charge Concentration [mol/]： 0.10070 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： 09/13/12 14：35：18 Device information Device： TitroLine 7000 Serial number： 00012 Software version： 1230 Titre_HCl_13_09_12-14_36_21.pdf Application Titration of the sample 100 ml of water sample are pipetted into a beaker and titrated. If the consumption using HCI mol/l 0.1should be less than 2 ml， the sample should be repeated using HCI 0.02 mol/l.Considering that thistitration is an end-point titration， the titrator should be calibrated on a weekly or daily basis. Select the Alkalinity method and start the titration. Result example： GLP documentation Titration graph 0.35 mlpH 8.200 4.47 mlpH 4.300 ·ml "pH/ml Method data Method name： Alkalinity (p+m) Titration duration： 3 m 17 s End date： 22.11.12 End time： 15：57：02 Titration data Pattern： 100.00000 ml Start pH： pH 8.913 End pH： pH 4.259 Start temperature： 21.4 C (a) End temperature： 21.5°C (a) Zero point： pH 7.00 / 0.0 mV Slope： 100.0%/-59.2 mV/pH EP1： 0.354 ml / pH 8.200 p-value： 0.35 mmol/l EP2： 4.475 ml / pH 4.300 m-value： 4.47 mmol/l Calculation formula p-value： (EP1-B)*T*M*F1/(V*F2) Mol (M)： 1.00000 m-value： EP2*T*M*F1/(V*F2) Mol (M)： 1.00000 Blank value (B)： 0.0000 ml Titre (T)： 0.10000000 (m) Factor 1(F1)： 10.0000 Pattern (V)： 100.0000 ml (f) Factor 2 (F2)： 0.0100 Statistics： Off Application Method The method is available as default method in the TL 6000/7000/TL 7750 titrator and ready to use. Method data overall view Method name：Alkalinity (p+m)Created at：11/22/1215：51：09Method type：Automatic titrationLast modification：11/22/12 15：53：15Measured value：pHDamping settings：NoneTitration mode：End pt.Documentation：GLPLinear steps：0.020 ml Measuring speed / drift：Normal：minimum holding time： 02smaximum holding time： 15 sMeasuring time： 02 sDrift： 20 mV/minInitial waiting time：0 sTitration direction：DecreasePretitration：OffEndpoint 1：pH 8.200delta endpoint 1： pH 0.500Endpoint delay 1： 4sEndpoint 2：pH 4.300delta endpoint 2： pH 1.000 Endpoint delay 2： 10 s Dosing parameter Dosing speed： 15 % Filling speed： 30 s Maximum dosing volume： 50.00 ml Unit values Unit size： 20ml Unit ID： 10039005 Reagent： HCl 0.1 mol/L Batch ID： no Charge Concentration [mol/l]： 0.10030 Determined at： 11/22/1218：14：29 Expire date： 08/18/12 Opened/compounded： 09/10/11 Test according ISO 8655： 05/10/11 Last modification： 11/22/12 10：14：33 Application Notes If you have any questions on the application， you can feel free to contact us.. 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