Thermo Fisher Scientific Ion Selective Electrodes Copper - Manual (Page 4)

Instruction Manual Copper Electrode
4
CUPRIC (COPPER) ION ELECTRODE
INSTRUCTION MANUAL
GENERAL INSTRUCTIONS
Introduction
The Cupric Ion Electrodes are used to quickly, simply,
accurately, and economically measure cupric 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 calibration
curves when using the meter in the mV mode.
3. A magnetic stirrer.
4. The Cupric Ion Electrode (reference electrode
necessary), the Cupric Ion Combination Glass Electrode,
or the Cupric Ion Combination Epoxy Electrode.
5. The Double Junction Reference with Filling Solution in
the inner junction and with Filling Solution in the
outer junction.
6. Polishing Paper to polish dirty or etched electrode
membranes.
Required Solutions
1. Deionized or distilled water for solution and standard
preparation.
2. Ionic Strength Adjuster (ISA), 5M NaNO
3
. To prepare
this solution from your own laboratory stock, add 425
grams reagent-grade sodium nitrate, NaNO
3
, to a 1 liter
volumetric flask about half full of distilled water.
Swirl the flask to dissolve the solid. Dilute to the
mark with distilled water, cap the flask, and upend it
several times to thoroughly mix the solution. To each
100 ml of standard or sample, add 2 ml of ISA. The
background ionic strength of the resulting solution
will be 0.1M.
3. Cupric Nitrate Standard Solution, 0.1M. This solution