Looking for a little routine help.

[SilverBackGorilla]

I'm really lacking in the biceps department and want to know if I can add in more bicep work on another day.

Current routine as follows...
Monday- Chest
Tuesday- Legs
Wednesday- Back
Thursday- Shoulders
Friday- Arms

I only have about 50 minutes a day and no weekend time to lift. I am open to any suggestions. Thank you!