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Silver/Silver Sulfide Electrode Instruction Manual

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