Solution
Perform meter checkout procedure (see
Meter
Instruction Manual
)
Unplug electrodes and reset
Hold reference electrode and push cap to expel a few drops of
filling solution
Use Orion 90-01 Reference Electrode with Orion 94-09
Be sure reference electrode is filled with Orion No. 900001 and
Orion 96-09 filled with Orion No. 900061
Remove bubble by redipping electrode in solution
Put electrodes in solution
Wipe plastic parts of meter with detergent solution
Check meter with shorting cap (see
Meter Instruction Manual
)
Check meter and stirrer for grounding
Remove bubble by redipping in solution
Do not use calomel reference electrode
Use recommended TISAB
Allow solutions to come to the same temperature
before measurement
Remove organic deposits (see
Measuring Hints
)
Use recommended filling solution
Prepare fresh standards
Use recommended TISAB
Use TISAB I
Refer to
Troubleshooting Guide
Use plastic labware
Plot millivolts on the linear axis. On the log axis, be sure
concentration numbers within each decade are increasing with
increasing concentration
Be sure to note sign of millivolt value correctly
Prepare fresh standards
Apply correct conversion factor: 10
-3
M = 19 ppm as F
-
Use known addition or titration techniques,
or a decomplexing procedure
Add 50 mL TISAB II or IV, or 5 mL TISAB III to each 50 mL
standard or sample
29
Summary of Contents for 96-09
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