CC testing with TF-100 test kit

[olienh]

I have been using my new TF-100 test kit and I had a question about testing CC.

Using a 10ml sample: after I test for FC and I add 5 drops of R-0003, I get a very faint pink color. One of R-0871 drop makes it go away, so that is roughly .5

My question is, do I need to use a 25ml sample to know just how close to .5 I am, or do I only worry about this if I have to add 2 drops of R-0871 to make the pink go away?

Thanks!

 

[JVTrain]

No need to do the 25 mL test. As long as your CC is 0.5 or less (1 drop or no color change) you're good to go.

 

[jblizzle]

Technically, you want the CC to never need more than 1 drop to clear as the CC should be very near 0.
If you did the 25ml test, we would still not want you to have to use more than 1 drop, meaning ideally the CC would be < 0.2

That said, just use the 10ml and 0.5ppm increments ... that is plenty precise.