Hanna Ulr phosphate checker bad reagent?

Discussion in 'Reef Chemistry by Randy Holmes-Farley' started by Coralville, Mar 8, 2018.

  1. Coralville

    Coralville Member

    Joined:
    Dec 28, 2015
    Messages:
    43
    Likes Received:
    11
    Anyone having suspicious results from their Hanna phosphate checker? I tested my parameters the same day I sent a sample off to Triton.

    Triton po4 0.015

    My po4 results 0.095 lot#H063
    0.092 lot#H071

    I checked it twice with 2 different lots of the reagent since I don’t usually have po4 this high. So the correct result is most likely Triton? @Randy Holmes-Farley ? I am having issues with my skimmer at the moment, so it is possible my phosphate levels have gone up. Don’t know which result to believe.

    Btw last year the triton results were 0.029 for po4 and the Hanna checker was 0.04, so very close.
     
    Mike Reef Addict likes this.
    Tags:

  2. Coralville

    Coralville Member

    Joined:
    Dec 28, 2015
    Messages:
    43
    Likes Received:
    11
    My Triton results are attached
     

    Attached Files:

  3. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Article Contributor Expert Contributor

    Joined:
    Sep 5, 2014
    Messages:
    29,234
    Likes Received:
    16,803
    Location:
    Arlington, Massachusetts, United States
    I wouldn't overly rely on assumptions about how well those two need to agree, unless it was a single sample split in half, and even then, the ICP sample likely sat around for a substantial period before testing, which may allow microbial processes in the vial to alter the results.
     
  4. Coralville

    Coralville Member

    Joined:
    Dec 28, 2015
    Messages:
    43
    Likes Received:
    11
    Ok, thank you!
     
Draft saved Draft deleted

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice
Loading...