Thermo Fisher Scientific Ion Selective Electrodes Potassium User Manual
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Instruction Manual
Potassium Electrode
2
TABLE OF CONTENTS
GENERAL INSTRUCTIONS .......................................................................................................... 3
Introduction ..............................................................................................................................................3
Required Equipment.................................................................................................................................3
Required Solutions ...................................................................................................................................3
GENERAL PREPARATION............................................................................................................ 4
Electrode Preparation ...............................................................................................................................4
Electrode Slope Check (with pH/mV meter) ...........................................................................................4
Electrode Slope Check (with ion meter) ..................................................................................................4
MEASUREMENT.............................................................................................................................. 5
Measuring Hints .......................................................................................................................................5
Sample Requirements...............................................................................................................................5
Units of Measurement ..............................................................................................................................6
MEASUREMENT PROCEDURE ................................................................................................... 6
Direct Measurement .................................................................................................................................6
Direct Measurement of Potassium (using a standard pH/mV meter) .......................................................6
Direct Measurement of Potassium (using an ion meter) ..........................................................................7
Low Level Potassium Determination (using a standard pH/mV meter) ..................................................8
Low Level Potassium Determination (using an ion meter)......................................................................9
ELECTRODE CHARACTERISTICS............................................................................................. 9
Reproducibility.........................................................................................................................................9
Interferences .............................................................................................................................................9
Temperature Influences..........................................................................................................................10
Electrode Response ................................................................................................................................11
Detection Limit ......................................................................................................................................11
pH Effects...............................................................................................................................................12
Electrode Life.........................................................................................................................................12
Electrode Storage ...................................................................................................................................12
ELECTRODE THEORY ................................................................................................................ 12
Electrode Operation ...............................................................................................................................12
TROUBLESHOOTING GUIDE .................................................................................................... 13
Meter ......................................................................................................................................................14
Glassware ...............................................................................................................................................14
Electrodes ...............................................................................................................................................14
Reagents .................................................................................................................................................14
Sample....................................................................................................................................................14
Technique...............................................................................................................................................15
TROUBLESHOOTING HINTS..................................................................................................... 15
SPECIFICATIONS.......................................................................................................................... 17
ORDERING INFORMATION....................................................................................................... 17