Subject: How do I calculate the iodine number

Hi, I am having problems with some homework exercisesin which I have to 
calculate the iodine numbers of some fats.  The equation I have been 
given has 
totally confused me and I can't find a good explanation anywhere. All I 
really 
need is a worked example of one question so that I can do the rest 
myself.
I.e. My blank has 0grams of fat, required 55.5ml of 0.1M thiosulphate 
and had a 
blank-fat source titration of 0ml.
So if one of my samples weighed 0.16grams, required 44.4ml f 0.1M 
thiosulphate 
and a blank-fat source titration value 11.1ml how would I calculate the 
iodin 
number?  Both samples contain 15ml of chloroform and 30ml of hanus iodine.
The equation my lecturer has given me is: 12.7/1000 x X
I think X is meant to be the blank-fat source titration value.

Re: How do I calculate the iodine number