Instruction Manual
Ammonium Electrode
1
EUTECH INSTRUMENTS PTE LTD.
AMMONIUM ION ELECTRODE
INSTRUCTION MANUAL
GENERAL INSTRUCTIONS
Eutech Instruments Ammonium Ion Electrode is used to measure ammonium ions in aqueous
solutions in a more simple, quick, accurate, and economical manner.
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 Ammonium Ion Combination Epoxy-body Electrode, Code no. EC-NH4-03.
Required Solutions
1.
Deionized or distilled water for solution and standard preparation.
2.
Eutech Ionic Strength Adjuster (ISA), 5M NaCl, Code no. EC-ISA-AM1-BT to keep a
constant background ionic strength present in the solution. To prepare the 5M NaCl ISA
from your own laboratory stock, add 292 grams of reagent-grade sodium chloride (NaCl)
to a 1,000 ml volumetric flask about half full of distilled water. Swirl the flask to dissolve
the solid and fill to the mark with distilled water. Cap the flask and invert several times to
mix the solution. Add 2 ml of ISA to every 100 ml of sample or standard solution for a
background ionic strength of 0.10M.
3.
Eutech Ammonium Standard, 0.1M NH
4
Cl, Code no. EC-SCS-AM1-BT. To prepare this
standard, add 5.34 grams of reagent-grade ammonium chloride to a 1 liter volumetric flask
about half full of distilled water. Swirl the flask to dissolve the solid and fill to the mark
with distilled water. Cap the flask and invert several times to mix the solution.
4.
Eutech Ammonium Standard, 1,000 ppm NH
4
+1
, Code no. EC-SCS-AM2-BT. To prepare
this standard, add 2.97 grams of reagent-grade ammonium chloride to a 1 liter volumetric
flask about half full of distilled water. Swirl the flask to dissolve the solid and fill to the
mark with distilled water. Cap the flask and invert several times to mix the solution.
