Thermo Fisher Scientific Ion Selective Electrodes Iodide - Manual (Page 3)

Instruction Manual Iodide Electrode
3
EUTECH INSTRUMENTS PTE LTD.
IODIDE ION ELECTRODE
INSTRUCTION MANUAL
GENERAL INSTRUCTIONS
Introduction
Eutech Instruments Iodide Ion Electrode is used to quickly, simply, accurately, and economically
measure free iodide ion in aqueous solutions.
Required Equipment
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.
Required Solutions
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, NaI. 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 NaI. 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.