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Old 08/04/2018, 08:02 AM   #1
phoenix001
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Salifert Ammonia Reading - post ro/pre di

Hi All

This is a test I just conducted on a sample of my water leaving my RO membrane but before the DI Resin. Looks like the reading is .25 or .5!! Does this mean my RO Membrane is shot?


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Old 08/04/2018, 08:03 AM   #2
phoenix001
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Guess the pic would help. sorry


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Old 08/04/2018, 12:51 PM   #3
Dan_P
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I assume the water is not slightly tinted :-)

I donít know for sure but Iíll wonder out loud. Can chloramine be decomposed to ammonia under the Salifert test conditions? And is your water treated with chloramine?


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Old 08/04/2018, 09:45 PM   #4
bertoni
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Maybe. I'd check whether there's chloramine in the water supply. If so, you might need a better carbon prefilter. I'd also check some distilled water. Ammonia kits often fail and read ammonia in everything.


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Old 08/05/2018, 07:43 AM   #5
Dan_P
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Quote:
Originally Posted by bertoni View Post
Maybe. I'd check whether there's chloramine in the water supply. If so, you might need a better carbon prefilter. I'd also check some distilled water. Ammonia kits often fail and read ammonia in everything.
Just wanted tighten up my understanding of what you meant. There are two types of ammonia test, one that uses salicylate with a blue to blue green color and one that uses Nesslerís reagent with a yellow to yellow-orange color. Which chemistry were you suggesting fails by giving false positives?


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Old 08/05/2018, 02:59 PM   #6
bertoni
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I haven't kept track, but my original ammonia kit came from the factory in the failed state, and read ammonia on distilled water, etc. It was Red Sea, but that was a long time ago.


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