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Thread: Phosphate effect on Taylor K-1766 chloride test

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    Phosphate effect on Taylor K-1766 chloride test

    The Taylor K-1766 "Potential Interferences" information states that orthophophate levels greater than 25ppm causes positive interference. Anyone know how much to adjust the result based on a phospate level that exceeds 25ppm? Mine tends to run 200-300ppm.
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    Re: Phosphate effect on Taylor K-1766 chloride test

    25 ppm is 25,000 ppb so hardly any pool has such levels. You do not have 200-300 ppm (parts-per-million); you have 200-300 ppb (parts-per-billion). We've only had one pool on this forum above 25,000 ppb and that was because of fairly massive amounts of HEDP metal sequestrant being used, far above normal usage levels.
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    Re: Phosphate effect on Taylor K-1766 chloride test

    Quote Originally Posted by chem geek View Post
    25 ppm is 25,000 ppb so hardly any pool has such levels. You do not have 200-300 ppm (parts-per-million); you have 200-300 ppb (parts-per-billion). We've only had one pool on this forum above 25,000 ppb and that was because of fairly massive amounts of HEDP metal sequestrant being used, far above normal usage levels.
    Ugg. A good reminder of the importance of double checking units of measure. Thanks
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