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Summary of Contents for Hanna Instruments HI 4104
- Page 1 4000-50 Instruction Manual HI 4004 HI 4004 HI 4004 HI 4004 HI 4004 Half-cell HI 4104 HI 4104 HI 4104 HI 4104 HI 4104 Combination Calcium Ion Selective Electrode...
- Page 2 HI 4004 Calcium Half-cell HI 4004 Calcium Half-cell HI 4004 Calcium Half-cell HI 4004 Calcium Half-cell HI 4004 Calcium Half-cell HI 4104 Calcium Combination Electrode HI 4104 Calcium Combination Electrode HI 4104 Calcium Combination Electrode HI 4104 Calcium Combination Electrode HI 4104 Calcium Combination Electrode I.
- Page 3 III. III. III. III. III. Theory of Operation Theory of Operation Theory of Operation : : : : : Theory of Operation Theory of Operation The HI 4004 and HI 4104 calcium electrodes are potentio- metric devices used for the rapid determination of free cal- cium ions in water, sea water and beverages.
- Page 4 IV. IV. IV. IV. IV. Design elements of the HI 4004 and HI 4104 Design elements of the HI 4004 and HI 4104 Design elements of the HI 4004 and HI 4104 Design elements of the HI 4004 and HI 4104 Design elements of the HI 4004 and HI 4104 electrodes electrodes...
- Page 5 V. V. V. V. V. Equipment required: Equipment required: Equipment required: Equipment required: Equipment required: The HI 4004 requires the Hanna HI 5315 Double junction reference electrode with HI 7082 as external electrolyte. Hanna HI 4222 pH/ISE/mV meter or other suitable ion or pH/mV meter (Note: log/linear graph paper is useful if an ISE (ion) meter is not available).
- Page 6 Due to shipping or storage the internal solution inside the PVC modules may have developed an air pocket near the membrane. Gently shaking the sensor down (like the old style mercury thermometer) will place the internal solution next to the membrane. Presoaking the Calcium sensor in HI 4004-45 solution for at least half-hour before calibration will help to optimize the sensor response.
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Page 7: Electrode Preparation
Additional HI 4104 guidelines Remove the protective plastic wrap that covers the ceramic junction before assembling sensor for the first time. Add reference HI 7082 fill solution to bottom of fill hole or empty and refill fill solution daily before us- ing. - Page 8 4000-50 3. Holding the assembled electrode at the cable end, shake the sensor to ensure internal fill solution that may have separated during shipping is in contact with inner membrane surface. 4. Prepare HI 5315 reference electrode by filling electro- lyte reservoir with HI 7082 fill solution.
- Page 9 Remove Parafilm Install sensing module 4. Rinse inner stem with deionized water making certain to wet o-ring found on the inner stem. 5. Reassemble electrode by gently pushing the inner assembly into the outer body, sliding spring down cable, and screwing cap into place. 6.
- Page 10 7. Holding the body of the electrode gently press upper cap with your thumb. This permits the fill solution to drain out of the body. Release cap and verify elec- trode returns to its original position. (You may need to gently assist for this to occur).
- Page 11 value should be more positive than the previous value noted. Determine the difference between the two mV values. An acceptable value for this slope is 26 ± 4 mV (20-25°C). X. X. X. X. X. Corrective action Corrective action Corrective action Corrective action Corrective action Verify module has been screwed into sensor handle or...
- Page 12 2. Unscrew upper cap and slide down cable toward con- nector. 3. Move spring and outer body down cable also. 4. Dry off inner stem and module with a soft tissue. 5. Hold inner stem and unscrew module and replace with a new one.
- Page 13 Procedure: Follow sections VIII and IX to prepare electrodes for mea- surement. 1) Follow section VI to prepare standards/ solution. Stan- dards should bracket and fall within the range of interest. Standards and solutions should be at the same temperature. 2) 2 mL of HI 4004-00 is added to 100 mL of both samples and standards.
- Page 14 XII. XII. XII. XII. Other Measurement T Other Measurement T Other Measurement T echniques echniques XII. Other Measurement T Other Measurement T echniques echniques echniques Known addition Known addition Known addition Known addition Known addition An unknown concentration can be determined by adding a known volume and concentration of Ca standard to the sample.
- Page 15 pH range of 4-10 . The electrode responds to free calcium ions only. Precipitates with oxalate, carbonate, phosphate and complexes with hydroxide, sulfate, and bicarbonate reduce measureable calcium from solution. Using Known Addition (section XII) with complexing reagents and pH adjustments may permits total calcium to be measured.
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Page 16: Warranty
Damage due to accidents, misuse, misapplication, tampering or lack of prescribed maintenance is not covered. Hanna Instruments reserves the right to modify the design, construction or appearance of its products without advance notice.
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