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

Instruction Manual Sodium Electrode
1
EUTECH INSTRUMENTS PTE LTD.
SODIUM ION ELECTRODE
INSTRUCTION MANUAL
GENERAL INSTRUCTIONS
Eutech Instruments Sodium Ion Electrode is used to measure sodium ions in aqueous solutions
quickly, simply, accurately, and economically.
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 Sodium Ion Combination Epoxy-body Electrode, Code no. EC-LNA-03.
5. Lab-ware made of glass, except for low level measurements where plastic-ware is
required.
Required Solutions
1. Deionized or distilled water for solution and standard preparation.
2.
Eutech Ionic Strength Adjuster (ISA), 4M NH
4
Cl/4M NH
4
OH, Code no. EC-ISA-LNA1-
BT. To prepare this solution from your own laboratory stock, half fill a 1,000 ml
volumetric flask with distilled water and add 214 grams of reagent-grade ammonium
chloride (NH
4
Cl). Under a hood, add 270 ml of concentrated ammonium hydroxide
(NH
4
OH), swirl the flask gently to dissolve the solid, and allow to cool. Fill the flask to
the mark with distilled water, cap, and upend several times to mix the solution.
3.
Dilute Electrode Rinse Solution. To prepare this solution from your own laboratory
stock, add 20 ml of ISA to a one liter volumetric flask and fill to the mark with distilled
water. Use this solution to rinse the electrode between measurements. DO NOT RINSE
WITH DISTILLED WATER.
4.
Eutech Sodium Standard, 0.1M NaCl, Code no. EC-SCS-LNA1-BT. To prepare this
solution from your own laboratory stock, half fill a one liter volumetric flask with
distilled water and add 5.84 grams of reagent-grade NaCl. 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.
5.
Eutech Sodium Standard, 1,000 ppm Na
+
, Code no. EC-SCS-LNA2-BT. To prepare this
solution from your own laboratory stock, half fill a one liter volumetric flask with
distilled water and add 2.542 grams of reagent grade NaCl. 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.