The Determination of the Acid Dissociation Constant of 7- hydroxycoumarin in Artificial Sea Water
Project Type
Event
Location
Alvin Sherman Library 1054
Start Date
19-4-2002 12:00 AM
End Date
19-4-2002 12:00 AM
The Determination of the Acid Dissociation Constant of 7- hydroxycoumarin in Artificial Sea Water
Alvin Sherman Library 1054
7-hydroxycoumarin also known as umbelliferone, is a monoprotic acid that is nonfluorescent in its acidic form and fluoresces in its basic form. The pKa of this acid is approximately 8 in aqueous solution. This is the pH of most natural seawater samples. This poster explores the advantages of using a flourescent indicator for the determination of seawater pH. In order to apply this technique to the analysis of sea water pH, the dissociation constants need to be determined in sea water matrix. The determination of the acid dissociation constant in artificial sea water over a range of temperatures and salinities is presented.
