eutech-instruments ammonia gas Manuel D’Utilisation
Instruction Manual
Ammonia Gas-sensing Electrode
1
EUTECH INSTRUMENTS PTE LTD.
AMMONIA GAS-SENSING ELECTRODE
INSTRUCTION MANUAL
GENERAL INSTRUCTIONS
Introduction
Eutech Instruments Ammonia Gas-Sensing Electrode is used to quickly, simply, accurately, and
economically measure dissolved ammonia in aqueous solutions. It can also be used to measure the
ammonium ion after conversion to ammonia or organic nitrogen from Kjeldahl digestion of the
sample. The measurement is not affected by sample color or turbidity and samples do not need to be
distilled. Interference from anions, cations, and dissolved species, other than volatile amines, do not
occur. With a flow-through cap, the electrode can be used in flow-through applications.
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.
meter in the mV mode.
3.
A magnetic stirrer.
4.
Eutech Ammonia Gas-sensing Electrode, Code No. EC-NH3-01.
Required Solutions
1.
Deionized or distilled water for solution preparation.
2.
Eutech Ammonia Standard, 0.1M NH
4
Cl, Code No. EC-SCS-AA1-BT. To prepare this
solution from your own laboratory stock, half fill a one liter volumetric flask with distilled
water and add 5.35 grams of reagent-grade NH4Cl. 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.
water and add 5.35 grams of reagent-grade NH4Cl. 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.
3.
Eutech Ammonia Standard, 1,000 ppm NH
3
as N, Code No. EC-SCS-AA2-BT. To prepare
this solution from your own laboratory stock, half fill a one liter volumetric flask with
distilled water and add 3.82 grams of reagent-grade NH4Cl. 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.
distilled water and add 3.82 grams of reagent-grade NH4Cl. 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.
4.
Eutech Ammonia Standard, 100 ppm NH
3
as N, Code No. EC-SCS-AA3-BT. To prepare
this solution from your own laboratory stock, half fill a one liter volumetric flask with
distilled water and add 0.382 grams of reagent-grade NH
distilled water and add 0.382 grams of reagent-grade NH
4
Cl. 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.
times to mix the solution.