Related Manuals for Hanna Instruments HI 4003
Summary of Contents for Hanna Instruments HI 4003
- Page 1 HI 4003 Instruction Manual HI 4003 HI 4003 HI 4003 HI 4003 HI 4003 Half-cell HI 4103 HI 4103 HI 4103 HI 4103 HI 4103 Combination Cadmium Ion Selective Electrode...
- Page 2 HI 4003 Cadmium Half-cell HI 4003 Cadmium Half-cell HI 4003 Cadmium Half-cell HI 4003 Cadmium Half-cell HI 4003 Cadmium Half-cell HI 4103 Cadmium Combination Electrode HI 4103 Cadmium Combination Electrode HI 4103 Cadmium Combination Electrode HI 4103 Cadmium Combination Electrode HI 4103 Cadmium 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 4103 or HI 4103 cadmium electrodes are potentio- metric devices used for the rapid determination of free cad- mium ions in samples and as a detector for the titration of cadmium with EDTA.
- Page 4 IV. IV. IV. IV. IV. Design elements of the HI 4003 and HI 4103 Design elements of the HI 4003 and HI 4103 Design elements of the HI 4003 and HI 4103 Design elements of the HI 4003 and HI 4103 Design elements of the HI 4003 and HI 4103 electrodes electrodes...
- Page 5 V. V. V. V. V. Equipment required: Equipment required: Equipment required: Equipment required: Equipment required: Hanna HI 5315 Double Junction Reference Electrode with HI 7072 Fill Solution for use with HI 4003 half- cell. Hanna HI 4222 pH/ISE/mV meter or other suitable ion or pH/mV meter.
- Page 6 VII VII VII VII VII. General Guidelines General Guidelines General Guidelines General Guidelines General Guidelines Concentrated samples (>0.10 M) should be diluted before measurement. Multiply the final result by the corresponding dilution factor. Calibration standards and sample solutions should have the same ionic strength. For high ionic strength samples, use standard addi- tion or titration methods.
- Page 7 Gas bubbles may form from solution out-gassing due to temperature change. Gently tap body of sensor to dislodge them from sensing membrane. HI 4003 Remove protective cover from sensor tip. HI 4103 Remove the protective plastic wrap that covers the ceramic junction before assembling sensor for the first time.
- Page 8 VIII. VIII. Electrode Preparation VIII. Electrode Preparation Electrode Preparation Electrode Preparation VIII. VIII. Electrode Preparation HI 4003 1. Remove protective cover from sensor tip. 2. Prepare reference electrode by filling outer electrolyte reservoir with HI 7072. 3. Place sensor and reference electrodes into electrode holder and connect cable connectors to meter.
- Page 9 6. 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 10 IX. IX. IX. IX. IX. Quick Check of Electrode Slope Quick Check of Electrode Slope Quick Check of Electrode Slope Quick Check of Electrode Slope Quick Check of Electrode Slope Connect sensors to pH/mV/ISE meter Place meter in mV mode. Place 100 mL of deionized water into a beaker with stir bar and 2 mL of HI 4000-00 ISA.
- Page 11 appear on polishing strip move the paper slightly and continue polishing. If the membrane is damaged, the response becomes extremely sluggish, or the slope of the electrode has decreased significantly, and procedures above have not helped, the sensor should be replaced. XI.
- Page 12 Procedure 1) Follow sections VIII and IX to prepare sensors for measurement. 2) Follow section VI to prepare standards / solution. Standards should bracket and fall within the range of interest. Two mL HI 4000-00 ISA is added to 100 mL of both samples and standards.
- Page 13 This technique is called Known Addition. The method can use an ideal sensor slope, but actual determined slopes at the temperature of measurement should be used if known. The volume and concentration of the added standard must cause a mV change of at least 8 mV. This method is preprogrammed in the Hanna HI 4222 pH/ISE/mV meter, which simplifies the method greatly.
- Page 14 the free ions from the measurement pool. + EDTA <—>Cd-EDTA The EDTA reacts with the cadmium ion forming a complex. The EDTA also can react with a host of other metals. Working at a pH between 4 and 6 optimizes the pH of the Cd-EDTA complex, and also discourages complexing with other ions that form stable complexes at high pH.
- Page 15 XIII. XIII. XIII.pH pH pH pH pH XIII. XIII. HI 4103 and HI 4003 electrodes may be used in solutions with values between 4.5 and 7.5 pH. Samples above pH 7.5 may form Cd(OH) . Adjust these samples with nitric acid.
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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.