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Thread: Using colored pH Buffer solution for probe calibration?

  1. #1
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    Using colored pH Buffer solution for probe calibration?

    I have some Fisher 4,7 and 10 pH buffer solution. These have color added to them. Are they fine to use to calibrate the pH probe? I also have a pH 4 that does not have color added to it. I already have my probes calibrated with the Neptune solutions so i may just stick a probe in and see if it reads the solution accurately.
    https://www.fishersci.co.uk/shop/pro...ion-2/10427260

  2. #2
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    You should be fine.
    Color is for identification purpose and does not effect the pH of the calibration solution.
    The probe is calibrated from the pH value, not the color.

  3. #3
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    Thanks!

  4. #4
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    So i just checked it against the Neptune calibration pH and in the neptune solution it reads 10.0, in the fisher buffer it reads 10.1. In the neptune solution I get 6.98 and in the fisher buffer i get a reading of 7.03. Are these values within tolerance to use the Fisher buffer and what one do you think is actually the better one to calibrate against? I am guessing the Fisher might actually be a little more accurate as this is meant to calibrate lab instruments.

  5. #5
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    Quote Originally Posted by jordanM View Post
    So i just checked it against the Neptune calibration pH and in the neptune solution it reads 10.0, in the fisher buffer it reads 10.1. In the neptune solution I get 6.98 and in the fisher buffer i get a reading of 7.03. Are these values within tolerance to use the Fisher buffer and what one do you think is actually the better one to calibrate against? I am guessing the Fisher might actually be a little more accurate as this is meant to calibrate lab instruments.
    Packets are more accurate because they cant evaporate and change pH over time. It's close enough to still use though.

    Sent from my SM-G965U using Tapatalk

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