eutech-instruments bromide epoxy Manuel D’Utilisation
Instruction Manual
Bromide Electrode
15
TROUBLESHOOTING GUIDE
The goal of troubleshooting is the isolation of a problem through checking each of the system
components in turn: the meter, the glass-ware, the electrodes, the standards and reagents, the
sample, and the technique.
The goal of troubleshooting is the isolation of a problem through checking each of the system
components in turn: the meter, the glass-ware, the electrodes, the standards and reagents, the
sample, and the technique.
Meter
The meter may be checked by following the check-out procedure in instrument instruction manual.
Glass-ware
Clean glass-ware is essential for good measurement. Be sure to wash the glass-ware well with a
mild detergent and rinse very well with distilled or deionized water. Clean glass-ware will drain
without leaving water droplets behind.
mild detergent and rinse very well with distilled or deionized water. Clean glass-ware will drain
without leaving water droplets behind.
Electrodes
The electrodes may be checked by using the procedure found in the sections entitled
Electrode
Slope Check.
1.
Be sure to use distilled or deionized water when following the procedures given in
Electrode Slope Check
.
2.
If the electrode fails to respond as expected, see the sections
Measuring Hints
and
Electrode Response
. Repeat the slope check.
3.
If the electrodes still fail to respond as expected, substitute another bromide ion electrode
that is known to be in good working order for the questionable electrode. If the problem
persists and you are using an electrode pair, try the same routine with a working reference
electrode.
that is known to be in good working order for the questionable electrode. If the problem
persists and you are using an electrode pair, try the same routine with a working reference
electrode.
4.
If the problem persists, the standards and/or reagents may be of poor quality, interferences
in the sample may be present or the technique may be faulty. (See sections
in the sample may be present or the technique may be faulty. (See sections
Standards and
Reagents
,
Sample,
and
Technique
below.)
5.
If another electrode is not available for test purposes, or if the electrode in use is suspect,
review the instruction manual and be sure to:
review the instruction manual and be sure to:
- Clean and rinse the electrodes thoroughly.
- Prepare the electrodes properly.
- Use the proper filling solution.
- Adjust the pH and the ionic strength of the solution by the use of the proper ISA.
- Measure correctly and accurately.
- Review
- Prepare the electrodes properly.
- Use the proper filling solution.
- Adjust the pH and the ionic strength of the solution by the use of the proper ISA.
- Measure correctly and accurately.
- Review
TROUBLESHOOTING HINTS
.
Standards and Reagents
Whenever problems arise with the measuring procedure that has been used successfully in the past,
be sure to check the standard and reagent solutions. If in doubt about the credibility of any of the
solutions, prepare them again. Errors may result from contamination of the ISA, incorrect dilution
of standards, poor quality distilled or deionized water, or a simple mathematical miscalculation.
be sure to check the standard and reagent solutions. If in doubt about the credibility of any of the
solutions, prepare them again. Errors may result from contamination of the ISA, incorrect dilution
of standards, poor quality distilled or deionized water, or a simple mathematical miscalculation.
Sample
Look for possible interferences, complexing agents, or substances which could affect the response
or physically damage the sensing electrode (or the reference electrode) if the electrodes work
perfectly in the standard, but not in the sample.
or physically damage the sensing electrode (or the reference electrode) if the electrodes work
perfectly in the standard, but not in the sample.