How would you calculate the volume of buffer to add to a tab

How would you calculate the volume of buffer to add to a tablet that is 9000 FCC units, to make a solution at 1000 units/mL concentration?

Solution

strength of the given tablet - 9000 FCC units

To make it in a solution form at 1000 units/mL concentration, 9000 unit tablet suspended in 90 mL of the buffer

because 9000 units/90 ml will give 1000 units/ml conc.

Grind the tablet to a finely ground powder in a mortar and pestle

Suspend or dissolve this powder of 9,000 units to 90 mL with buffer, including mortar and pestle rinses.

Solution may be a little cloudy because of the undissolved binder but now has the required concentration of

1000 units/ml