I am interested in getting better accuracy than 0.5 on the CC reading. It would seem to make sense that if you increase the sample size to 25cc and keep the amount of the first FAS-DPD reagent the same, then you could divide the number of drops of FAS-DPD#2 by 5 instead of 2 (since the sample is 2.5 times bigger, you should have 2.5x more chlorine in it so 2.5 x 2 = 5).

I didn't see any response to Kurt's suggestion positive or negative so can anyone confirm that the 25 cc test method is legit?

Thanks

Peter