Phosphate effect on Taylor K-1766 chloride test

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Cedarpool

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Jun 14, 2015
21
Cedar Park, TX
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.
 
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.
 
chem geek said:
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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Ugg. A good reminder of the importance of double checking units of measure. Thanks
 
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