Ionode IJ pH V5.1 Manuel d'utilisateur

IJ SERIESINTERMEDIATE JUNCTIONInstruction ManualIJ 44 A/C - pH electrode - spear tipIJ 40 A/C - pH electrode- spear tipIJ 64 - ORP/Re

Ionode IJ Instruction Manual 10 The reference half-cell completes the circuit. The primary IJ reference is a silver/silver chloride elem

Ionode IJ Instruction Manual 11 If the restriction becomes clogged and movement of ions becomes inhibited, the electrode will appear to

Ionode IJ Instruction Manual 12 Figure 11 Not to Scale

Ionode IJ Instruction Manual 13 Offset Each pH electrode has a small offset which varies from electrode to electrode. It is due to an

Ionode IJ Instruction Manual 14 calibration. It can also be accurately measured using the mV mode of a pH meter. 1) Measure the temperature of two

Ionode IJ Instruction Manual 15 further details, please contact Ionode specifying make and model of pH/mV meter or titrator. Sodium Error The se

Ionode IJ Instruction Manual 16 Graph 1

Ionode IJ Instruction Manual 17 Response Time This varies according to the pH glass composition, membrane wall thickness, pH meter filteri

Ionode IJ Instruction Manual 18 4.3. Measurement 1) Turn on the pH meter and connect the pH electrode. Connect a temperature sensor (ATC) i

Ionode IJ Instruction Manual 19 4.3.1. Helpful Hints 1) Use the same technique to measure samples as was used for calibration. Be consi

Table of Contents 1. Introduction 3 2. Parts List 3 3. Preparation 4 4. pH 6 4.1. Theory 6 4.2. Electrode Characteristics 7 4.3. Measurem

Ionode IJ Instruction Manual 20 4.4. Maintenance 1) When not in use, keep the electrode immersed in 2-3M KCl (saturated KCl is approx

Ionode IJ Instruction Manual 21 4.4.1. Cleaning As pH and ORP are surface based measurements, the cleanliness of the sensor and junctio

Ionode IJ Instruction Manual 22 4.5. Calibration Standards 4.5.1. NBS pH Buffers pH 4.01: 0.05M Potassium Hydrogen Phthalate Dissolve 10.12g of

Ionode IJ Instruction Manual 23 4.5.2. Secondary pH Buffers pH 7.65: Tris Buffer Dry Tris (2-amino-2-(hydroxymethyl)propane-1,3-diol) and Tris

Ionode IJ Instruction Manual 24 Table 2: pH Values of Standard Buffers at Various Temperatures Temperature (T) 0.05M potassium hydrogen phth

Ionode IJ Instruction Manual 25 4.5.3. Sleeve Electrolytes The IJ reference system allows a variety of sleeve electrolytes. For high visco

Ionode IJ Instruction Manual 26 3M Sodium Chloride Add 17.5g of NaCl to 100 mL volumetric flask and fill to the mark with distilled water.

Ionode IJ Instruction Manual 27 4.6. Troubleshooting A fault may develop in either the meter or electrode. If a number of electrodes a

Ionode IJ Instruction Manual 28 Symptom Possible Causes Remedy Low Slope (<94%) Contaminated Buffers Replace buffers Membrane not Clean See 4.6

Ionode IJ Instruction Manual 29 Symptom Possible Causes Remedy Large Offset (>0.5pH) Insufficient Sleeve Electrolyte See 3. Preparation Junction

Ionode IJ Instruction Manual 3 Figure 1 1. Introduction The IJ series of electrodes are designed to be versatile, robust, reliable, accurate an

Ionode IJ Instruction Manual 30 4.7. Specifications Table 5: IJ44 pH electrode specifications Parameter Operating Range pH Range 0-14 pH (C glass)

Ionode IJ Instruction Manual 31 5. ORP 5.1. Theory ORP stands for oxidation reduction potential. Ideal ORP obeys the Nernst equation: 

Ionode IJ Instruction Manual 32 way pH does not characterize the buffering capacity. 5.1.1. Output ORP values are determined by measuring

Ionode IJ Instruction Manual 33 Table 6: Potential Relationships (mV) of Several Reference Electrodes at 25ºC SHE SCE Saturated KCl Ag/AgCl/ 1M

Ionode IJ Instruction Manual 34 5.2. Measurement Unlike a pH electrode, an ORP electrode does not require asymmetry potential and slope correct

Ionode IJ Instruction Manual 35 different potentials and irreversible redox couples. 4) Use only a high impedance mV meter. 5) Use fresh stan

Ionode IJ Instruction Manual 36 5.4. Calibration Standards Light's solution and ZoBell's solution are NBS standards which are stable

Ionode IJ Instruction Manual 37 Table 8: ZoBell’sSolution vs Ag/AgCl/Sat KCl Reference) Temperature (ºC) Potential (mV) 5 273 10 262 15 251 20

Ionode IJ Instruction Manual 38 5.5. Troubleshooting A fault may develop in either the meter or electrode. If a number of electrodes a

Ionode IJ Instruction Manual 39 Symptom Possible Causes Remedy Not within Tolerance (±20mV) Contaminated Standards Replace standards Correlating to

Ionode IJ Instruction Manual 4 3. Preparation PLEASE NOTE: IJ series electrodes are shipped without sleeve electrolyte and must be filled prio

Ionode IJ Instruction Manual 40 5.6. Specifications Table 11: IJ64 and IJ64_xx specifications Parameter Operating Range Range -2000mV to +2000mV Acc

Ionode IJ Instruction Manual 41 6. Metal 6.1. Application – IJAu The IJAu uses a gold rod as sensor and is designed for determining ORP

Ionode IJ Instruction Manual 42 6.3. Specifications Table 12: IJAu and IJAg specifications Parameter Operating Range Range -2000mV to +2000mV Accur

Ionode IJ Instruction Manual 43 7. Optional Accessories RE45 - 3M KCl reference electrolyte gel,45mL KS200 –Electrode storage solution, 200ml KC200

Ionode IJ Instruction Manual 44 Warranty Any electrode found to be faulty due to manufacture will be replaced. All IJ electrodes have a serial numbe

Ionode IJ Instruction Manual 5 out the end of the electrode through the ground junction. Check this has occurred. Insufficient electrol

Ionode IJ Instruction Manual 6 4. pH 4.1. Theory pH is a scale of active hydrogen ion concentration in aqueous solution. In pure water,

Ionode IJ Instruction Manual 7 4.2. Electrode Characteristics 4.2.1. Construction A pH electrode consists of two electrochemical half-cells usuall

Ionode IJ Instruction Manual 8 Part of the circuit is electronic (heavy lines) (see Figure 6). The remainder is ionic. Unlike other pH electrode mea

Ionode IJ Instruction Manual 9 Unequal concentrations of H+ on either side of the membrane cause the system to equalise the number of positiv