User manual HANNA INSTRUMENTS HI 4107

[. . . ] HI 4107 CHLORIDE COMBINATION HI 4007 Instruction Manual HI 4007 HI 4107 Chloride Ion Selective Electrode Half-cell Combination 1 CHLORIDE HI 4007 Chloride Half-cell HI 4107 Chloride Combination Electrode I. Introduction: The Hanna HI 4007and HI 4107 are ion selective electrodes designed for the measurement of chloride ions in aqueous solutions. The HI 4007 is a solid state half-cell sensor that requires a separate reference. The HI 4107 is a combination ion selective electrode. [. . . ] For optimum response, this level should be maintained and not be allowed to drop more than 2-3 cm (1-inch) below fill hole. It must cover the ceramic found on the inner stem. · If an erratic measurement occurs, check to see if foreign matter is seen trapped near the internal cone. Drain and refill with fresh fill solution. 7 VIII. Remove protective cover from sensor tip. Prepare reference electrode by filling outer electrolyte reservoir with HI 7072. Place sensor and reference electrodes into electrode holder and connect cable connectors to meter. Unwrap plastic film seal found over ceramic junction on inner stem and discard. This is only used for shipping and long term storage. Rinse inner stem with deionized water making certain to wet the o-ring found on the inner stem. Deionized Water Remove Parafilm 3. Reassemble electrode by gently pushing the inner assembly into the outer body, sliding spring down cable, and screwing cap into place. Remove fill hole cover and o-ring on fill hole spout. Using the dropper pipette provided, add a few drops HI 7072 fill solution to the electrode, wetting the oring and rinsing out the fill solution chamber. 8 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 electrode returns to its original position. (You may need to gently assist for this to occur). 7. Tighten the electrode cap onto the body and fill electrode body until fill solution volume is just below fill hole. Position electrode in a Hanna HI 76404 electrode holder (or equivalent) and connect plug to meter. 9 HI 4107 DE CHLORI ATION IN COMB IX. · · · · · · · Quick Check of Electrode Slope Connect sensors to pH/mV/ISE meter Place meter in mV mode. Place 100 mL of DIW into a beaker with stir bar. Place reference and measuring half-cell into prepared sample. [. . . ] These values are plotted on the semi-log paper and the points are connected to form a straight-line curve. When samples are measured, their mV values are converted to concentration by following the mV to the concentration axis on the semi-log plot. 11 1) 2) 3) 4) 5) Procedure Follow sections VIII and IX to prepare sensors for measurement. Follow section VI to prepare standards/ solution. Standards should bracket and fall within the range of interest. [. . . ]