Hanna-instruments HI 4012 Manual do Utilizador Página 1

1HI 4012HI 4012HI 4012HI 4012HI 4012HI 4112HI 4112HI 4112HI 4112HI 4112Lead IonSelective ElectrodeInstruction Manual Half-cell CombinationLEAD/S

10IX. IX. IX. IX. IX. Quick Check of Electrode SlopeQuick Check of Electrode SlopeQuick Check of Electrode SlopeQuick Check of Electrode Slo

11 applying gentle pressure. Continue polishing untilyou are satisfied with the surface. If dark depositsappear on polishing strip move the p

12 Procedure1) Follow sections VIII and IX to prepare sensors formeasurement.2) Follow section VI to prepare standards / solution.Standards

13This technique is called Known Addition. The method canuse an ideal sensor slope, but actual determined slopes atthe temperature of measurement sh

14the sulfate ions forming a precipitate.Pb2+ + SO4.2- <—> PbSO4 (insoluble)At the stoichiometric end point, a change in mV occurs.Measuremen

15Plot generated on Hanna HI 901 Titrator duringPlot generated on Hanna HI 901 Titrator duringPlot generated on Hanna HI 901 Titrator duringPlot ge

16MAN4112 01/07 WARRANTY WARRANTY WARRANTY WARRANTY WARRANTYHanna Instruments Ion Selective Electrodes are warrante

2HI 4012 Lead Half-cellHI 4012 Lead Half-cellHI 4012 Lead Half-cellHI 4012 Lead Half-cellHI 4012 Lead Half-cellHI 4112 Lead Combination Electrod

3III. III. III. III. III. Theory of OperationTheory of OperationTheory of OperationTheory of OperationTheory of Operation:::::The HI 4012 or HI 4112 l

4IV. IV. IV. IV. IV. Design elements of the HI 4012 and HI 4112Design elements of the HI 4012 and HI 4112Design elements of the HI 4012 and HI 41

5V. V. V. V. V. Equipment required:Equipment required:Equipment required:Equipment required:Equipment required:• Hanna HI 5315 Double Junction Re

6VIIVIIVIIVIIVII. General GuidelinesGeneral GuidelinesGeneral GuidelinesGeneral GuidelinesGeneral Guidelines• Use of a hood and protective clothing

7• Gas bubbles may form from solution out-gassing dueto temperature change. Gently tap body of sensor todislodge them from sensing membrane.HI 4

8VIII. VIII. VIII. VIII. VIII. Electrode PreparationElectrode PreparationElectrode PreparationElectrode PreparationElectrode PreparationHI 4

96. Holding the body of the electrode gently press uppercap with your thumb. This permits the fill solution todrain out of the body. Release cap and