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Reference

Impact of pH 

The usable pH range is determined depending on the type and the 
structure of the ion selective electrode. 
In general, this range is smaller when the concentration of the ions to be 
measured is lower. 
Also, depending on the ion selective electrodes, the components of the ion 
selective membrane may be dissolved by the pH or the electrode potential 
may change due to the impact of the pH. 
Furthermore, the impact of pH may cause a decrease in the slope of the ion 
selective electrode, or parallel shifting of the calibration curve. 
To prevent these effects, set the pH to an appropriate value in advance and 
keep it constant. 

One simple method to set the pH of the sample solution to an appropriate 
value for measurement is to prepare a pH buffer solution (not containing 
interfering ions) that will not interfere with the ion selective electrode in 
advance, and add a small amount of it to the sample solution. 

How to prepare a sample solution 

If the pH of the sample solution is below 5 or more than 11, adjust the pH as 
described in the following procedure.

If the pH of the sample solution exceeds 11, adjust the pH in the range of 
5 to 11 by adding hydrochloric acid.

If the pH of the sample solution is less than 5, adjust the pH in the range 
of 5 to 11 by adding sodium hydroxide.

Summary of Contents for 6582S-10C

Page 1: ...Instruction Manual Combination type Potassium Ion Selective Electrode 6582S 10C ELECTRODE...

Page 2: ...t to change without notice Warranty and responsibility This product is not covered by warranty because it is a consumable item HORIBA Advanced Techno Co Ltd SHALL NOT BE LIABLE FOR ANY DAMAGES RESULTI...

Page 3: ...esult in death or serious injury This is to be limited to the most extreme situations This indicates a potentially hazardous situation which if not avoided could result in death or serious injury This...

Page 4: ...it contains important safety messages Precautions for chemicals Solutions used for calibration and measurement must not come in contact with the skin or consumed These solutions stimulate the eyes an...

Page 5: ...f the ion selective membrane is dry soak the electrode in pure water for at least one hour Using it in a dry state will cause measurement errors Do not get the electrode connector wet or touch it with...

Page 6: ...This manual mainly discusses how to operate the meter to which the combination type potassium ion selective electrode is connected Electrode Stand Instruction Manual This manual mainly discusses how...

Page 7: ...for first time 10 Filling with internal solution 12 Rinsing the electrode 15 Connecting the electrode to the meter 16 Calibration 17 Standard solutions 18 Calibration operation 19 Measurement 29 Requ...

Page 8: ...hen accurate measurement is not possible 48 Reference 53 Ion selective electrodes 54 Measurement principle of ion selective electrode 56 Characteristics of potassium ion selective electrode 60 Materia...

Page 9: ...e ion selective electrode 54 Fig 5 State of liquid junction of reference electrode 55 Fig 6 Relationship between monovalent cation concentration activity and electrode potential 57 Fig 7 Difference in...

Page 10: ...59 Table 5 Relationship between temperature of ion selective electrode and theoretical slope 62 Table 6 Relationship between temperature of potassium ion selective electrode and theoretical slope 62...

Page 11: ...his chapter describes what you should know before using the product Confirmation of the items included in the package 2 About this product 3 Product features 3 System configuration 3 Names of parts 4...

Page 12: ...e item For details on purchasing an electrode and reagent refer to Consumables page 70 1000 mg L standard solution 50 mL 100 mg L standard solution 50 mL Internal solution 50 mL Syringe Protective pip...

Page 13: ...contamination of the sample solution by the internal solution outflow the interference on the electrode potential and so on Since the structure of the liquid junction movable sleeve type is capable o...

Page 14: ...ion electrode tip against damage from gravel or other foreign matters If there is no risk of damage it is not required to attach it Ion selective membrane Liquid junction When the ion electrode tip is...

Page 15: ...figure shows the procedure for measuring the K concentration 1 Measurement preparation 1 2 4 3 Meter Fill with internal solution page 12 Connect the electrode to the meter page 16 Attach the ion elec...

Page 16: ...Measurement In the following cases perform conditioning of the electrode before calibration For details on conditioning refer to Conditioning of the electrode page 23 1 2 Perform calibration page 22...

Page 17: ...measurement When the electrode will not be used for two weeks or longer store it as described on page 44 2 1 Rinse the electrode with pure water page 42 Discharge the internal solution from the electr...

Page 18: ...8...

Page 19: ...lectrode Preparation This chapter describes the preparation that must be performed before using the product Assembling the electrode only when use for first time 10 Filling with internal solution 12 R...

Page 20: ...emble the electrode as described in the following procedure 1 Remove the protective cap 2 Remove the rubber cap The rubber cap will not be used again Dispose of it according to the local rules and reg...

Page 21: ...11 Electrode Preparation Calibration Measurement After Measurement 3 Attach the ion electrode tip by turning it clockwise Ion electrode tip...

Page 22: ...ement is performed in the state in which there is not much internal solution an inflow of sample solution into the electrode will result in accurate measurements no longer being possible Use the inter...

Page 23: ...of the internal solution fill port 4 Fill the internal solution with a dropper Fill until the solution surface comes up to just below the internal solution fill port 5 Spread soft and clean lint free...

Page 24: ...ion fill port It is best that the internal solution oozes out slightly If the outflow is extremely little the potential of the reference electrode will become unstable and susceptible to stir In such...

Page 25: ...described in the following procedure 1 Rinse the electrode with pure water 2 Wipe off the moisture Wipe off the moisture using soft and clean lint free paper or cloth 3 Make sure that there are no dir...

Page 26: ...the connector of the meter to which the electrode will be connected refer to the instruction manual of the meter 1 Connect the electrode connector to the meter When disconnecting the electrode from t...

Page 27: ...Electrode Preparation Calibration Measurement After Measurement Calibration This chapter describes calibration Standard solutions 18 Calibration operation 19...

Page 28: ...the package or available as consumables by HORIBA Advanced Techno 100 mg L K standard solution Use the standard solution included in the package or available as consumables by HORIBA Advanced Techno 1...

Page 29: ...efore the calibration operation Filling with internal solution page 12 Rinsing the electrode page 15 Perform conditioning before the first use before use after storage for two weeks or longer or if th...

Page 30: ...sed as an example in the following steps 3 Prepare the first solution for calibration 1 Put 50 mL of 100 mg L standard solution into a 100 mL beaker 2 Add 1 mL of ISA 3 Stir the solution slowly with a...

Page 31: ...ed so that the stir bar will rotate 3 or 4 turns per second If swirling occurs on the surface the stirring speed is too fast Reduce the speed to a level where swirling does not occur Additive amount o...

Page 32: ...Rinse the electrode with pure water 6 Wipe off the moisture Wipe off the moisture using soft and clean lint free paper or cloth 7 Open the rubber stopper of the internal solution fill port Rubber sto...

Page 33: ...ction Conditioning of the electrode In the following cases perform conditioning of the electrode before calibration Before the first use Before use after storage for two weeks or longer If the electro...

Page 34: ...sure that the rubber stopper of the internal solution fill port is open during calibration If it is closed the internal solution does not ooze out very much from the liquid junction As a result the p...

Page 35: ...tion for calibration 12 Rinse the electrode with pure water 13 Wipe off the moisture Wipe off the moisture using soft and clean lint free paper or cloth 14 Soak the electrode in the second solution fo...

Page 36: ...pen during calibration If it is closed the internal solution does not ooze out very much from the liquid junction As a result the potential of the reference electrode will become unstable and suscepti...

Page 37: ...n the second calibration is finished take out the electrode from the solution for calibration 19 Close the rubber stopper of the internal solution fill port Check that slope is at least 80 If the slop...

Page 38: ...water 21 Wipe off the moisture Wipe off the moisture using soft and clean lint free paper or cloth When disposing of the standard solution and paper or cloth soaked in the standard solution follow the...

Page 39: ...aration Calibration Measurement After Measurement Measurement This chapter describes measurement Requirements for sample and standard solutions 30 Measurement hints 31 Measurement units 31 Measurement...

Page 40: ...e kept at 50 C or less Exceeding 50 C may cause electrode deterioration The standard solution in calibration and the sample solution in measurement shall have almost the same temperature Match the tem...

Page 41: ...iquid junction The measurable pH range differs depending on the type and structure of the ion selective electrode The pH range is generally smaller when the concentration of the ions to be measured is...

Page 42: ...tion The calibration characteristics vary depending on the temperature The standard solution in calibration and the sample solution in measurement shall have almost the same temperature Match the temp...

Page 43: ...oth It is best to control the stirring speed so that the stir bar will rotate 3 or 4 turns per second If swirling occurs on the surface the stirring speed is too fast Reduce the speed to a level where...

Page 44: ...to the liquid junction Do not touch the stir bar with the electrode It may damage the electrode Make sure that the rubber stopper of the internal solution fill port is open during measurement If it i...

Page 45: ...concentration is finished take out the electrode from the sample solution It is recommended to place the electrode in the electrode stand If gravel or other foreign matter gets in the sample solution...

Page 46: ...36 9 Close the rubber stopper of the internal solution fill port 10 Rinse the electrode with pure water 11 Wipe off the moisture Wipe off the moisture using soft and clean lint free paper or cloth...

Page 47: ...Electrode Preparation Calibration Measurement After Measurement After Measurement This chapter describes cleaning of the electrode after measurement How to clean the electrode 38...

Page 48: ...an the electrode Clean the electrode after use as described in the following procedure 1 Open the rubber stopper of the internal solution fill port View video View video Dropper Item to be prepared Ru...

Page 49: ...tinue pressing from above until all of the internal solution is discharged Extracting from the internal solution fill port Turn the electrode upward and extract the internal solution with a dropper Wh...

Page 50: ...trode with pure water 5 Wipe off the moisture Wipe off the moisture using soft and clean lint free paper or cloth 6 Make sure that there are no dirt and crystals of internal solution adhered to the ar...

Page 51: ...paration Calibration Measurement After Measurement 7 Attach the protective cap Do not get water and foreign matter inside of the protective cap when attaching it to the electrode It may shorten the li...

Page 52: ...42...

Page 53: ...chapter describes the storage procedure of the electrode as well as the lifespan and replacement procedure of each part of the electrode Storage 44 Main unit of electrode 44 Consumables 45 Consumable...

Page 54: ...and discharge the internal solution After Measurement page 37 2 Attach the protective cap Do not get water and foreign matters inside of the protective cap when attaching it to the electrode It may s...

Page 55: ...and ion electrode tip are not repairable parts Service life Replace after approx 400 hours Ion electrode tip Replace consumables at the period whichever occurs first approx one year after purchase or...

Page 56: ...ination type potassium ion selective electrode including the ion electrode tip 3200697409 Use this up before the expiration date displayed on the bottle Use this up before the expiration date displaye...

Page 57: ...Troubleshooting Troubleshooting This chapter describes the measures to take when accurate measurement is not possible When accurate measurement is not possible 48...

Page 58: ...ave almost the same temperature Match the temperature as close as possible by for example using a thermostatic bath The temperature difference may cause measurement errors Requirements for sample and...

Page 59: ...remove any air bubbles remaining on the ion selective membrane If air bubbles remain on the ion selective membrane it may result in inaccurate measurement Note on page 35 Is a solution at a temperatur...

Page 60: ...e standard solution with water other than pure water will cause measurement errors Standard solutions page 18 Is calibration performed before each measurement Perform calibration before each measureme...

Page 61: ...ths after opening the bottle Do not return the standard solution to its bottle once it has come out of the bottle Consumables page 45 Is the amount of the discharging internal solution appropriate Pre...

Page 62: ...52...

Page 63: ...lectrodes 54 Measurement principle of ion selective electrode 56 About activity 58 Characteristics of potassium ion selective electrode 60 Measurement range 60 Impact of pH 61 Impact of temperature 62...

Page 64: ...ion selective electrode where two electrodes are integrated Fig 4 Structure of combination type ion selective electrode Electrodetype Electrode function Ion selective electrode An electromotive force...

Page 65: ...ple solution or standard solution as a mechanism of generating such a stable potential The stable potential with almost no change V 0 can be generated by the diffusion of the outflow of the internal s...

Page 66: ...ation measurement using an ion selective electrode 2 303 RT nF is the change of the electrode potential generated when the ion concentration activity is changed by a factor of ten times and is referre...

Page 67: ...ionship between monovalent cation concentration activity and electrode potential To perform the above quantitative analysis using an ion selective electrode either 1 use an ion meter or meter with an...

Page 68: ...ed in the sample solution which can be represented by the Nernst equation page 56 According to the above equation if the potential gradient is determined by the calibration using the standard solution...

Page 69: ...1 10 3 mol L the activity coefficient becomes lower than 1 If the activity coefficient becomes lower than 1 activity ion concentration an error occurs in the potential measurement An ISA is used to r...

Page 70: ...of around 1 10 1 mol L and a minimum of around 1 10 6 mol L to 1 10 5 mol L Furthermore when lower concentration is measured where the linearity is not established perform calibration at two points in...

Page 71: ...e To prevent these effects set the pH to an appropriate value in advance and keep it constant One simple method to set the pH of the sample solution to an appropriate value for measurement is to prepa...

Page 72: ...temperature on the measurement of the K concentration is to reduce the difference between the temperature of the standard solution in calibration and the temperature of the sample solution in measurem...

Page 73: ...t ions Although ion selective electrodes have good selectivity with respect to the ions to be measured they may react to the other ions The ions which interfere the measurement of the concentration of...

Page 74: ...s that cause a 10 error in the reading and their concentrations If drift of the potential or reduction in the response speed occurs high interference by the ions shown in the table is likely to be occ...

Page 75: ...to reach a reading value that is 95 stabilized is within 30 seconds approximately in the case of a standard solution with a concentration ranging from 10 mg L to 100 mg L Impact of light With some typ...

Page 76: ...t This reduces the errors in the ion concentration measurement due to the electromotive force changes caused by the temperature changes of the ion selective electrode and reference electrode Measureme...

Page 77: ...Specifications Material This chapter describes the specifications external dimensions and consumables of the product Specifications 68 External dimensions 69 Consumables 70...

Page 78: ...nge differs depending on the ion concentration 3 This is the electrode potential gradient in the calibration using the 10 mg L and the 100 mg L standard solutions at 25 C Item Description Operating te...

Page 79: ...69 Specifications External dimensions Unit mm 16 5 O D 18 85 150...

Page 80: ...m ion selective electrode 6582S 10C 3200697409 Potassium ion selective electrode tip 7682S Electrode tip 3200697413 1000 mg L potassium ion standard solution 500 K SH 500 mL 3200697183 100 mg L potass...

Page 81: ...t jp For any questions regarding this product please contact your local agency or inquire from the following website http global horiba com contact_e index htm 31 Miyanonishi cho Kisshoin Minami ku Ky...

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