Thermo Fisher Scientific Ion Selective Electrodes Silver - Manual (Page 2)

Silver/Silver Sulfide Electrode Instruction Manual
2
TABLE OF CONTENTS
GENERAL INSTRUCTIONS .......................................................................................................... 3
Introduction................................................................................................................................................................ 3
Required Equipment................................................................................................................................................... 3
Required Solutions ..................................................................................................................................................... 3
GENERAL PREPARATION ..........................................................................................................................5
Electrode Preparation ................................................................................................................................................. 5
Electrode Slope Check (with pH/mV meter) ............................................................................................................. 5
Electrode Slope Check (with ion meter) .................................................................................................................... 6
MEASUREMENT ............................................................................................................................................7
Measuring Hints ......................................................................................................................................................... 7
Sample Requirements................................................................................................................................................. 7
Units of Measurement ................................................................................................................................................ 8
MEASUREMENT PROCEDURE ................................................................................................... 8
Direct Measurement ................................................................................................................................................... 8
Direct Measurement of Silver (using a pH/mV meter) .............................................................................................. 8
Direct Measurement of Silver (using an ion meter) ................................................................................................... 9
Direct Measurement of Sulfide (using a pH/mV meter) .......................................................................................... 10
Direct Measurement of Sulfide (using an ion meter) ............................................................................................... 11
Low Level Silver Determinations (using a pH/mV meter) ...................................................................................... 12
TITRATION..................................................................................................................................... 13
Titration of Sulfide................................................................................................................................................... 14
Titration of Silver..................................................................................................................................................... 14
Low Level Chloride Titration .................................................................................................................................. 15
Indicator Titration .................................................................................................................................................... 16
ELECTRODE CHARACTERISTICS........................................................................................... 18
Reproducibility......................................................................................................................................................... 18
Interference .............................................................................................................................................................. 18
Complexation ........................................................................................................................................................... 18
Temperature Influences............................................................................................................................................ 18
Electrode Response .................................................................................................................................................. 19
Limits of Detection .................................................................................................................................................. 20
pH Effects ................................................................................................................................................................ 20
Electrode Life........................................................................................................................................................... 20
Electrode Storage ..................................................................................................................................................... 20
ELECTRODE THEORY ................................................................................................................ 21
Electrode Operation ................................................................................................................................................. 21
TROUBLESHOOTING GUIDE .................................................................................................... 22
Meter ........................................................................................................................................................................ 22
Glassware ................................................................................................................................................................. 22
Electrodes................................................................................................................................................................. 22
Standards and Reagents............................................................................................................................................ 23
Sample...................................................................................................................................................................... 23
Technique................................................................................................................................................................. 23
TROUBLESHOOTING HINTS..................................................................................................... 24
SPECIFICATIONS.......................................................................................................................... 26
ORDERING INFORMATION....................................................................................................... 26