Adsorption Indicators

Bromo-phenol blue:
Dissolve 0.1g in distilled water.
 

Dichlorofluorescein:
Dissolve 0.1g in 60 - 70 % ethanol, or
Dissolve 0.1g of dichlorofluoroceinate in 100ml water.
 

Diphenylamine;Dissolve 1g in 100 ml conc. sulphuric acid
 

Di-iododimethylfluorescein:
Dissolve 1g in 70 5 ethanol.
 

Diphenylcarbazide:
Dissolve 0.1g in 100 ml ethanol.
 

Diphenylcarbazone:
Dissolve 0.1g in 100 ml ethanol or iso-propyl alcohol.
 

Eosin:
Dssolve 0.1g in 100ml 70 % ethanol, or 0.1g of the sodium salt in 100 ml water.
 

Ferric indicator:
Use a saturated Ammonium Ferric sulphate soln. (~ 40%), add a few drops of 6M nitric acid, and use 1 ml for each titration.
 

Fluorescein:
Dissolve 0.2g in 100 ml 70 % alcohol, or
Dissolve 0.2g of sodium fluorocienate in 100 ml water.
 

Rhodamine:
Dissolve 0.05 g in 100 ml water.
 

Tertrazine:
Dissolve 0.5g in water and use 4 drops per titration.