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Instruction Manual 

 

Iodide Electrode

 

 

3

 

GENERAL INSTRUCTIONS 
 

 
Eutech Instruments Iodide Ion Electrode is used to quickly, simply, accurately, and economically 
measure free iodide ion in aqueous solutions. 
 

 

1. 

A pH/mV meter or an ion meter, either line operated or  portable. 

 
2. 

Semi-logarithmic 4-cycle graph paper for preparing calibration curves when using the 
meter in the mV mode. 

 
3. 

A magnetic stirrer. 

 
4. 

Eutech Iodide Ion Combination Epoxy-body Electrode, Code no. EC-IO-03. 

 
5. 

Polishing Paper, Code no. EC-MIS-PP, to polish dirty or etched electrode membranes. 

 

 

1. 

Deionized or distilled water for solution and standard preparation. 

 
2. 

Eutech Ionic Strength Adjuster (ISA), 5M NaNO

3,

 Code no. EC-ISA-IO1-BT. To prepare 

this solution from your own laboratory stock, half-fill a 1,000 ml volumetric flask with 
distilled water and add 425 grams of reagent-grade sodium nitrate. Swirl the flask gently to 
dissolve the solid. Fill to the mark with distilled water, cap, and upend the flask several 
times to mix the solution. 

 
3. 

Eutech Iodide Standard, 0.1M NaI, Code no. EC-SCS-IO1-BT. To prepare this solution 
from your own laboratory stock, half-fill a one liter volumetric flask with distilled water and 
add 10.3 grams of reagent-grade sodium iodide, NaBr. Swirl the flask gently to dissolve the 
solid. Fill to the mark with distilled water, cap, and upend several times to mix the solution. 

 
4. 

Eutech Iodide Standard, 1,000 ppm I

-1

, Code No. EC-SCS-IO2-BT. To prepare this solution 

from your own laboratory stock, half-fill a one liter volumetric flask with distilled water and 
add 1.29 grams of reagent-grade NaBr. Swirl the flask gently to dissolve the solid. Fill the 
flask to the mark with distilled water, cap, and upend several times to mix the solution.