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Thread: CC Testing

  1. Back To Top    #1

    Join Date
    Jul 2011
    St. Paul, MN

    CC Testing

    When performing the FAS-DPD test, for the FC test I added drops of R-0871 until I thought the water turned clear. I then added five drops of R-0003 to perform the CC test. The solution turned pink, but then clear again upon adding 1 drop of R-0871, giving a CC of 0.5.

    Since I haven't had any CCs in a while, I repeated the test. This time I added one extra drop of the R-0871 (one drop past clear) during the FC test. This time, when I added the 5 drops of R-0003 the water did not turn pink, giving a CC of 0.

    I am thinking that during the first test, the solution never got completely clear during the FC test, and that's why it turned pink when adding the R-0003. Is it OK to add an extra drop of R-0871 during the FC test before performing the CC test?
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  2. Back To Top    #2
    Mod Squad woodyp's Avatar
    Join Date
    Apr 2010
    East Texas

    Re: CC Testing

    Either .5 or less you're good to go.
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  3. Back To Top    #3
    frogabog's Avatar
    Join Date
    Jul 2010
    Portland, Oregon

    Re: CC Testing

    Since you added an extra drop of R-0871 after it turned clear, you count that as a drop when testing for CC with the R-0003. Same as if you added the R-0871 after the 5 drops of R-0003.
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