How different are your readings? I get pretty consistent results when I do multiple tests, they're never bang on, but they are within 0.01ml on the syringe.
I would be more suspicious of the amount of other reagents. Are you doing the half-resolution-for-more-tests-per-kit thing? Because I find it's really hard to get exactly half a spoonful of the powdered reagent. For the cost of kits, I suggest not bothering with halfing the reagents because you're sure to get larger fluctuations with that.
__________________
-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
|