If the volume of the end product is less than 40ml and you started with 2 carts (4000mg) and 40ml of oil + dissolving solution then here's the math:
Initial solution: 4000mg/40ml = 100mg/ml of TA injectible
Then you filtered, heated, baked, whatever and at the end got out only 32ml of solution. Well, the only way to have the concentration go higher (above 100mg/ml) is to have evaporated some of the dissolving soln (BA/BB prolly) and assuming that 3-5ml of that is what was in your kit (likely) then the best you could hope for is:
Final solution: 4000mg/35ml = 114mg/ml of TA injectible
But most likely the difference between the 32 that you got out and the 40 that you put in is due to spillage, absorbtion by the coffee filters, Whatman, etc... So it is very likely that your end solution is somewhere between 100-115 mg/ml.
thanks bro
DrG