To get a 1% iodine solution, you'd need 10 mg of iodine per ml. So that's 100 mg for a 10 ml disinfection solution.
It's been ages since I've taken general chem, but Eric, are you sure of these concentration calculations?
I was doing a little searching on Google and I found
this webpage. According to this page, one tablet in a quart/liter canteen gives you an approximately 5% solution. That should be a decent antiseptic strength without the iodine becoming too irritating to the wound.