R-0871 (TF-100) question

[Jake&Clan]

Are the results of the R-0871 FAS/DPD reagent different if the liquid is warmed up? If so is there a "margin of error" I can mentally add/subtract to compensate?

In years past when using Taylor test kits I always thought I saw a difference in drip-test results when the kit had been on the deck for a few hours and the reagents were warm. Accordingly, they always tell you to store your test in a "cool dry place."

It is much easier for me to leave my TF-100 kit in the outdoor storage box near my pool. I don't use the drip test hardly ever. I always use the R-0870 10g DPD powder test. For pH, I have a high end digital test meter in a water proof case (and is itself water proof). I do occasionally test for TA and CYA but the pool's pH and chlorine use has been so stable this season I usually do it when I want an exscuse to play around the pool longer

 

[duraleigh]

By far, the most accurate testing is done indoors in a controlled environment. There is no need to "warm up" anything,

By far, the best storage method is in that same controlled environment. You will get the most value and accuracy from your kit by keeping it inside.

 

[Newdude]

+1. I keep my kit on the shelf in the coat closet. It's out of the way and climate controlled yet easily accessible. I grab a sample and test at my kitchen table for everything but CYA. It all goes in the kitchen sink and gets rinsed after.

 

[Bperry]

Are the results of the R-0871 FAS/DPD reagent different if the liquid is warmed up? If so is there a "margin of error" I can mentally add/subtract to compensate?

In years past when using Taylor test kits I always thought I saw a difference in drip-test results when the kit had been on the deck for a few hours and the reagents were warm. Accordingly, they always tell you to store your test in a "cool dry place."

It is much easier for me to leave my TF-100 kit in the outdoor storage box near my pool. I don't use the drip test hardly ever. I always use the R-0870 10g DPD powder test. For pH, I have a high end digital test meter in a water proof case (and is itself water proof). I do occasionally test for TA and CYA but the pool's pH and chlorine use has been so stable this season I usually do it when I want an exscuse to play around the pool longer

Not likely to be an accuracy difference except that the CYA test is supposed to be room temperature. The DPD powder can kinda go bad if moisture gets in there.

 

[Jake&Clan]

Not likely to be an accuracy difference except that the CYA test is supposed to be room temperature. The DPD powder can kinda go bad if moisture gets in there.

Yeah I'm not overly concerned about it being the absolute most accurate. I just need a roundabout figure to know what to dump in the thing. The kit stays in a sealed box so there's no way water can get in there.

By far, the most accurate testing is done indoors in a controlled environment. There is no need to "warm up" anything,

By far, the best storage method is in that same controlled environment. You will get the most value and accuracy from your kit by keeping it inside.

I'm thinking you may have read my question incorrectly. I'm not "needing" to warm up anything. I want an accurate test with my kit staying outdoors in a sealed waterproof box which brings the powder and the liquid reagent to outdoor temperatures and I want to make sure that it's still accurate enough for me to be able to determine within one part per million with the chlorine levels are.

+1. I keep my kit on the shelf in the coat closet. It's out of the way and climate controlled yet easily accessible. I grab a sample and test at my kitchen table for everything but CYA. It all goes in the kitchen sink and gets rinsed after.

Every one of my tests is right at the pool side. Pool is a couple hundred feet away from the house lol. Definitely not that committed that's for sure.

 

[JoyfulNoise]

Humidity will destroy the reagents. They should be kept indoors in a cool and dry space. The R-0870 powder is hygroscopic and will go bad if exposed to too much humidity. The FAS titrating reagent can go bad if exposed to moisture and high heat. Leaving the kit outdoors minimizes it’s useful life and since the reagents don’t go “instantly” bad, their degradation over time will lead to erroneous results.