Madwil & Carl,
I follow the Taylor instructions per the letter – and do not repeat any of the previous steps. I guess an answer would be to use a 25ml water sample to begin with, which in turn would provide a 0.2ppm / drop of R0871 when testing for ‘lower levels’ (<= 0.5ppm) of CC. However, I will have to wait on my order of reagents (R0871 in particular) to try this method. I’m sorry if my previous posting was not real clear? Thank you and have a great day!
Gene