Sciencemadness Discussion Board

mono, di, or tribasic Potassium Phosphate

Octal40 - 17-10-2005 at 19:49

Culturing mycelia via liquid submersion. I've chosen Potassium Phosphate as my source of phosphorus. It comes in mono, di, or tribasic form. What's the difference and which is best for this application?

denatured - 17-10-2005 at 20:00

As you know phosphoric acid has three H to substitute ... the pH of each is different from the another...

Usually fertilizers for phosphorus is "Super Phosphate" which mainly consists of Calcium Triphosphate ...

That will depend on what is the pH for optimum growth of Mycelia. so you can choose which salt you are going to use.

Incase you don't know ... potassium is strong base and phosphoric acid is rather weak acid ... pH of their salts will be more than 7.

[Edited on 18-10-2005 by alnokta]

and the ph is...

Octal40 - 18-10-2005 at 08:22

Optimum ph is 5.2. Thanks for the info. Now that I know the ph is the determining factor I'll just check the ph on each and get whichever is closest to the optimum.

Thanks.