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Thread: Frozen testing chemicals

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    Frozen testing chemicals

    In the fall I thought I brought all of my FAS-DPD testing chemicals in the house to protect from freezing. I just found an 8oz bottle of the CYA reagent R-0013 in my shed frozen solid. I've heard that some testing chemicals should not be used after being frozen. Is R-0013 a chemical that can be used after being frozen or should I just toss the bottle?
    Pool: 25k gal, IG Vinyl, built 2008, DE, Hayward Progrid 4820 - 96 GPM 48 sq ft filter area, 1.5hp Hayward Super Pump, 3/4hp Hayward booster pump 6060, Aquarite SWG T-Cell-90 Rev 1.40, Hayward Phantom, Hayward H350 heater.
    Hot Tub: 2008 Sundance Cameo, 450 gal

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    Mod Squad Bama Rambler's Avatar
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    Re: Frozen testing chemicals

    Dave will probably have the definitive answer, but R-0013 is pretty inert. I'd thaw it out and run a test on your pool water and see how it does. You should have an idea of how much CYA was in the pool water when you closed it. Unless of course your pool is frozen.
    Dave J. TFP Moderator
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    Re: Frozen testing chemicals

    + 1 what bama said. For that particular reagent, I can't say for absolute certain but my bet is it will perform fine.
    Dave S.
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    Re: Frozen testing chemicals

    Hi, I just wanted to close the loop on this. After my frozen R-0013 thawed, I used some to test the CYA level in my hot tub. Results were the same as a test I ran about a week ago. So, frozen R-0013 reagent isn't a problem.
    Pool: 25k gal, IG Vinyl, built 2008, DE, Hayward Progrid 4820 - 96 GPM 48 sq ft filter area, 1.5hp Hayward Super Pump, 3/4hp Hayward booster pump 6060, Aquarite SWG T-Cell-90 Rev 1.40, Hayward Phantom, Hayward H350 heater.
    Hot Tub: 2008 Sundance Cameo, 450 gal

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    Patrick_B's Avatar
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    Re: Frozen testing chemicals

    Good to know, thanks for the feedback.
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    Re: Frozen testing chemicals

    While we are sort of on this topic, does anyone know which test reagents have the longest shelf life, and which the shortest?
    Ike
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    Mod Squad jblizzle's Avatar
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    Re: Frozen testing chemicals

    I think it greatly depends on how you store them. The CYA is inert and the longest ... beyond that I do not know. I have a TF-100 that is over 3 years old that still gives me accurate results (SHHH ... don't tell Dave ) ... although some of the regents have now been replaced when I ran out.
    Jason, TFP Moderator
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    Re: Frozen testing chemicals

    The dyes, the reagents which provide the initial color in most of the tests, tend to be the most sensitive and last the shortest. The FAS-DPD titrant (R-0871) is also sensitive.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Frozen testing chemicals

    Interesting topic. I'm needing some 0871 and saw it at Amazon at $10 for (12) 2 oz bottles, cheap! If I could freeze it and make it last 3 or 4 years might be worth it. Here's some good info from Taylor:
    http://www.taylortechnologies.com/Ch...SP?ContentID=2
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    Re: Frozen testing chemicals

    Quote Originally Posted by JasonLion View Post
    The dyes, the reagents which provide the initial color in most of the tests, tend to be the most sensitive and last the shortest. The FAS-DPD titrant (R-0871) is also sensitive.
    I know this to be true as a general rule. Indicators and normally the first to go.
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