Indicators versus Electrodes

Titrant Indicator for visual endpoint Sample information Electrode Combined pH electrode for Acetic acid All indicators - aqueous solution

Sample contains silver salt or Ferric ammonium sulfate TS silver nitrate VS is added in Combined silver electrode Ammonium thiocyanate excess for residual titration

Ferric ammonium sulfate TS Sample contains mercury Combined gold electrode Other indicators Combined silver electrode Copper ion-selective electrode Barium Perchlorate All indicators and Ag/AgCl reference electrode

Surfactant electrode resistant to Methylene blue Chlorinated solvents are used chlorinated solvents and Ag/AgCl reference electrode Benzethonium Chloride Surfactant electrode suitable for Other indicators non-ionic surfactants and Ag/AgCl reference electrode

Copper ion-selective electrode Bismuth Nitrate All indicators and Ag/AgCl reference electrode

Bromine All indicators Combined platinum electrode

Ceric Ammonium Nitrate All indicators Combined platinum electrode

Ceric Ammonium Sulfate All indicators Combined platinum electrode

Ceric Sulfate All indicators Combined platinum electrode

Copper ion-selective electrode Cupric Nitrate All indicators and Ag/AgCl reference electrode Polarizable gold or platinum Dichlorophenol–Indophenol All indicators electrode Hydroxy naphthol blue, calconcarboxylic acid Combined calcium ion-selective triturate, or combined calcium ion-selective electrode electrode Edetate Disodium Copper ion-selective electrode Other potentiometric indication and Ag/AgCl reference electrode Other indicators Photometric sensor

Ferric Ammonium Sulfate All indicators Combined platinum electrode

Ferrous Ammonium Sulfate All indicators Combined platinum electrode

Combined pH electrode for All indicators Solvent is water aqueous solution Hydrochloric Acid Combined pH electrode for non- All indicators Non-aqueous solvent aqueous solution Combined pH electrode for non- Alcoholic Hydrochloric Acid All indicators aqueous solution Combined pH electrode for non- Hydrochloric Acid in Methanol All indicators aqueous solution

Iodine All indicators Combined platinum electrode

Lead ion-selective electrode Lead Nitrate All indicators and Ag/AgCl reference electrode

1 of 3 Pages Updated: November 2020 Indicators versus Electrodes

Titrant Indicator for visual endpoint Sample information Electrode Lead ion-selective electrode Lead Perchlorate All indicators and Ag/AgCl reference electrode Lithium Methoxide in Combined pH electrode for non- All indicators Chlorobenzene aqueous solution Combined pH electrode for non- Lithium Methoxide in Methanol All indicators aqueous solution Combined pH electrode for non- Lithium Methoxide in Toluene All indicators aqueous solution Eriochrome black-T-sodium chloride Photometric sensor Copper ion-selective electrode Magnesium Chloride Copper ion-selective electrode and Ag/AgCl reference electrode Mercuric Nitrate All indicators Combined gold electrode

Oxalic Acid All indicators Combined platinum electrode Combined pH electrode for non- Perchloric Acid in Dioxane All indicators aqueous solution Perchloric Acid (in Glacial Acetic Combined pH electrode for non- All indicators Acid) aqueous solution

Potassium Arsenite All indicators Combined platinum electrode

Potassium Bromate All indicators Combined platinum electrode

Polarizable platinum wire Potassium Bromide–Bromate All indicators electrode

Potassium Dichromate All indicators Combined platinum electrode

Potassium Ferricyanide All indicators Combined platinum electrode

Combined pH electrode for non- Alcoholic Potassium Hydroxide All indicators aqueous solution Combined pH electrode for non- Methanolic Potassium Hydroxide All indicators aqueous solution Combined pH electrode for All indicators Solvent is water aqueous solution Potassium Hydroxide Combined pH electrode for non- All indicators Non-aqueous solvent aqueous solution

Potassium Iodate All indicators Combined platinum electrode

Potassium Permanganate All indicators Combined platinum electrode

All indicators Combined silver electrode Separate silver electrode and Potassium Thiocyanate silver-based indicator electrode and a double-junction double-junction reference reference electrode electrode All indicators Combined silver electrode Silver-sulfide specific ion- Silver-ion selective electrode or silver-sulfide specific selective electrode and ion-selective electrode Ag/AgCl reference electrode Silver Nitrate Separate silver electrode and Silver-silver chloride double junction reference double-junction reference electrode and a silver billet electrode electrode All other potentiometric indication Combined silver electrode

Potentiometric indication Combined silver electrode Silver Nitrate in (Isopropyl) Silver billet indicator electrode and a silver–silver Separate silver electrode and Alcohol chloride double-junction reference electrode double-junction reference containing a potassium nitrate salt bridge electrode

2 of 3 Pages Updated: November 2020 Indicators versus Electrodes

Titrant Indicator for visual endpoint Sample information Electrode

Sodium Arsenite All indicators Combined platinum electrode

Combined pH electrode for All indicators and potentiometric indication Solvent is water aqueous solution Combined pH electrode for non- All indicators and potentiometric indication Non-aqueous solvent Sodium hydroxide aqueous solution Combined pH electrode with Glass-calomel or a silver-silver chloride electrode double-junction reference system with potassium nitrate filling solution system Combined pH electrode for non- Alcoholic Sodium Hydroxide All indicators aqueous solution Combined pH electrode for non- Sodium Methoxide in Methanol All indicators aqueous solution Combined pH electrode for non- Sodium Methoxide in Toluene All indicators aqueous solution All indicators, platinium-calomel electrodes, or Combined platinum electrode combined platinum electrode Sodium Nitrite Platinum-platinum electrodes Polarizable platinum electrode

Surfactant electrode suitable for bromophenol blue solution (1 in 2000) non-ionic surfactants and Sodium Tetraphenylboron Ag/AgCl reference electrode Combined potassium ion- combined potassium ion selective electrode selective electrode Sodium Thiosulfate All indicators Combined platinum electrode Combined pH electrode for All indicators and potentiometric indication Solvent is water aqueous solution Sulfuric Acid Combined pH electrode for non- All indicators and potentiometric indication Non-aqueous solvent aqueous solution Combined pH electrode for All indicators Dilution with water aqueous solution Sulfuric Acid in Alcohol Combined pH electrode for non- All indicators Non-aqueous solvent aqueous solution Combined pH electrode for non- Tetrabutylammonium Hydroxide All indicators aqueous solution Tetrabutylammonium Hydroxide Combined pH electrode for non- All indicators in Methanol/Isopropyl Alcohol aqueous solution Tetramethylammonium Bromide All indicators Combined silver electrode

Tetramethylammonium Chloride All indicators Combined silver electrode

Titanium Trichloride All indicators Combined platinum electrode

All indicators Photometric sensor Zinc Sulfate Copper ion-selective electrode copper ion-selective electrode and Ag/AgCl reference electrode

3 of 3 Pages Updated: November 2020