Instruction Manual
Potassium Electrode
1
EUTECH INSTRUMENTS PTE LTD.
INSTRUCTION MANUAL
POTASSIUM ION ELECTRODE
Page 1: ...Instruction Manual Potassium Electrode 1 EUTECH INSTRUMENTS PTE LTD INSTRUCTION MANUAL POTASSIUM ION ELECTRODE...
Page 2: ...of Potassium using a standard pH mV meter 6 Direct Measurement of Potassium using an ion meter 7 Low Level Potassium Determination using a standard pH mV meter 8 Low Level Potassium Determination usi...
Page 3: ...grade potassium chloride Swirl the flask gently to dissolve the solid Fill to the mark with distilled water cap and upend several times to mix the solution 3 Eutech Potassium Standard 1 000 ppm K 1 Co...
Page 4: ...instability is observed see the TROUBLESHOOTING section 2 Using a pipet add 1 ml of 0 1M or 1 000 ppm potassium standard to the beaker When the reading is stable record the mV reading 3 Using a pipet...
Page 5: ...perature To counteract this effect place a piece of insulating material such as styrofoam sheet or asbestos sheet between the stirrer and beaker Always rinse the electrode tip s with distilled water a...
Page 6: ...2 10 3 and 10 4 M or 100 10 and 1 ppm standards by serial dilution of the 0 1M or 1 000 ppm standard Measure out 100 ml of each standard into individual 150 ml beakers Add 2 ml of ISA per 100 ml of st...
Page 7: ...de tip s in the solution When the reading has stabilized record the millivolt reading Determine the concentration directly from the calibration curve 7 The electrode s should be re calibrated every 1...
Page 8: ...meter display 12 The electrodes should be re calibrated every 1 2 hours Simply repeat Steps 2 8 2 9 above Low Level Potassium Determination using a standard pH mV meter This procedure is recommended f...
Page 9: ...tip s into the solution 10 After the reading has stabilized record the mV reading and determine the concentration from the low level calibration curve 11 Prepare a new low level calibration curve dai...
Page 10: ...ris hydroxymethyl aminomethane Interferences ppm 100 ppm K 1 10 ppm K 1 1 ppm K 1 Cs 1 1 0X102 1 0X101 1 0 K 1 2 7X102 2 7X101 2 7 Tl 1 3 1X103 3 1X102 3 1X101 H 1 1 6 pH 2 6 pH 3 6 pH Ag 1 2 7X105 2...
Page 11: ...chloride solutions The upper limit of detection is above 1 0X10 1 M when other ions are present but the possibility of a liquid junction potential developing at the reference electrode and the salt e...
Page 12: ...rained of filling solution if refillable and the rubber insert placed over the filling hole ELECTRODE THEORY Electrode Operation A potassium ion electrode consists of an electrode body containing an i...
Page 13: ...difference between the two solutions since ions diffuse at different rates When making measurements it is important to remember that this potential be the same when the reference is in the standardiz...
Page 14: ...es in the sample may be present or the technique may be faulty See Reagents Sample and Technique sections below 5 If another electrode is not available for test purposes or if the electrode in use is...
Page 15: ...Reading see meter instruction manual electrode s not unplug electrode s and reset plugged in properly reference electrode be sure reference electrode is not filled filled air bubbles on remove bubble...
Page 16: ...se recommended ISA standard used as ISA use ISA defective electrode check electrode operation electrode exposed soak electrode standard to interferences in potassium air bubble on membrane remove bubb...
Page 17: ...ducibility 2 Samples Aqueous solutions only no organic solvents Size 110 mm length 12 mm diameter 1 m cable length Storage Electrode should be stored in dilute potassium standard ORDERING INFORMATION...
