Subject: Help with trapping CO2 in soda lime

I am doing a project about collecting air samples from different areas and 
comparing the amounts of Carbon Dioxide in each. To do this, I am trapping the 
Carbon Dioxide in Soda Lime. I bake the soda lime, expose is to the CO2, let 
it incubate, bake it again, and weigh. The difference is the amt of CO2. I put 
about 6 grams of soda lime in each baloon (which is what I am using for the 
trapping). So far, the results have not been very productive, and I was 
wondering how much soda lime i should put in each baloon to measure each 
sample. Also, how much time should i incubate it for. Please give me tips to 
get a difference in weight, showing an existence of soda lime. Also, i need a 
range of how much weight change to expect.

I got this soda lime idea from a response to another student that was from 
Mark Schneegurt from the University of Notre Dame. A response from him will be 
greatly appreciated.

P.S. please respond ASAP, this is URGENT (sorry for the rush)

Re: Help with trapping CO2 in soda lime