Videne Rinsing

[Chris The Masher]

Hi all,

Just got myself some Videne ordered up for this coming weekends brew. It's going to be the first time I use to replace my old fashioned Sodium Met that I have been using up until now. I've just read the great post on cleaning / sterilising Corny's with the Oxy followed by the Videne and am going to give it a try.

I think I am right when I say this can be used as both a non rinse and a rinse.

My question is; what method seems to be the preferred on this site and also what the dilution rate be for each method.

I still have doubts about doing a grand job on cleaning and sterilising and then just rinsing with tap water which has the potential to contaminate again (don't it ????) :wha:

Thanks......

 

[Aleman]

1.25ml per litre no rinse

can use up to 2.5ml as no rinse as well, but given that 12.5ppm does the job well why use more

 

[Wez]

1.25ml per Litre is a no rinse solution.

Rinsing with tap water is confusing subject, why go to the effort and then potentially contaminate again....

Personal choice/experience etc.

I used to rinse but now dont using the above solution.

 

[Chris The Masher]

Great Stuff, thanks for the quick replies.

Just hope my Videne turns up and I don't get the phone call tomorrow asking for my surgeons license before they sell to me !

Thanks......

 

[timbim]

Tangentially related, videne needs to be in acid solution to last in a mister etc, is cleaning grade citric the best acid to use?

Tim

 

[Aleman]

Ideally pH 3.0 . . .and done with phosphoric acid as it is taste neutral . . citric acid is a little bit 'sour'. . . .could also use CRS as well

 

[timbim]

Thanks again for your infinite wisdom A.

BrewUK calling it a mild acid is a bit dubious, I wonder what concentration their solution is.

 

[Aleman]

There are acidified iodophors about, that can in concentrated form be considered a strong acid (Brupaks is one), I'm thinking of driving over to the other side of Preston and getting some FAM30 which is a diary disinfectant iodophor. . . And that one certainly does need careful handling when concentrated . . . mainly due to the high level of phosphoric acid it contains

 

[Vindiv8]

Would it be ok to mix as and when required without the acid? If so how long would it keep just diluted with plain tap water?

 

[Tony]

I mix mine up as and when I need it and only use it on the day I make it (although it should last a few days). I make up 750ml and at 12.5ppm the 500ml bottle I have is going to last a long time!
:

 

[Cyclops]

I mix mine up as and when I need it and only use it on the day I make it (although it should last a few days). I make up 750ml and at 12.5ppm the 500ml bottle I have is going to last a long time!
:

I do the same with mine, have a 600ml bottle though, only use about 60 ml though, lol
throw it away after i have done using it, i normally sanatise everything after i have used it, like jugs, mashtun, boiler, etc then put it into storage, i know it is pointless but makes me feel better :)

I bought 2 500ml bottles as i heard they might ban it in the future due to the EU and iodine?

I normally fill it with purified water instead of tap water, dont know if this will affect it or not.

 

[timbim]

I wonder if it'd be particularly safe to acidify it with a few drops of spirits of salt :hmm: Only need a few drops to get to pH 3

 

[Cyclops]

I wonder if it'd be particularly safe to acidify it with a few drops of spirits of salt :hmm: Only need a few drops to get to pH 3

or vinegar?

 

[timbim]

No!

pKa of ethanoic acid (vinegar) is around 5. In practical terms, that means you'd need to add a lot to get down to the pH 3 required.

A lot in this case is a 10M solution of ethanoic acid, which is enormous.

Tim

 

[Cyclops]

No!

pKa of ethanoic acid (vinegar) is around 5. In practical terms, that means you'd need to add a lot to get down to the pH 3 required.

A lot in this case is a 10M solution of ethanoic acid, which is enormous.

Tim

oh right, wont be putting vinegar in it then, lol

 

[timbim]

Oops! Mucked up that calculation spectacularly. Should be in fact that a 0.1M solution is required for pH 3. But given that vinegar is only 1M ethanoic acid, you'd still need 1 part vinegar for every 10 parts of solution to get there. Think you might be able to taste that!

Edit:

Aleman, to get a citric acid solution at pH 3, you need 0.001M, or 0.21g in a litre of solution. Reckon you could taste that? What about after it's been diluted again by a factor of several thousand, given that you're filling a bottle with only drips remaining in it. I'm trying to find some data on the citric acid taste threshold, but can't. Found one paper that looked promising, but we don't get the journal :evil: