I guess it depends on how long your working and how long she can hold it!! Have you considered a dog walker to let her out a few hours after you have been gone, or maybe come home at lunch time to let her out.. ?? If your working 8 hours a day it would be hard to expect her to hold it that long. Maybe you could consider the
www.pottypatch.com which you can purchase I believe at walgreens and petco for about 40.00 it smells and looks like grass, of course there are better ones available online.
Craigslist in my area has dogwalkers, or maybe there is a highschool student you can trust in your neighboorhood , that could use a few buck to take her out and play with her for a little while when she/he gets home from school.