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Old 08-03-2012, 12:31 PM   #1
rigger7
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Default Iodine to Water ratio

I'm going to be using Betadine with 10% Povidone iodine,it says on the bottle that it is a topical solution.
I was wondering how much of the Iodine should I mix with water?



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Old 08-03-2012, 01:01 PM   #2
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Revvy gave a great breakdown of this in another post. Here's what he had to say:

Quote:
Yes you can use just about any iodine/iodophor product for sanitization, many of us use a dairy grade iodine based sanitizer since it is really cheap in bulk, can be bought at most farm and feed stores, and since it is used to meet the stringent safety requirments for milk processing/milk handling, it is more than suitable for our needs.

The standard dillution for 1.5% titratable iodine is 1 tablespoon/5 gallons. DIfferent 5 will require a different dillution ratio.

This appears to be a good breakdown of various iodophors and their dillution.

Quote:
Iodophors

Postby DaaB on Tue Apr 15, 2008 6:50 pm
Iodophor and Betadine/Videne

Iodophor is a combination of iodine and an agent such as Povidone to make it water soluable.

Iodophor solution is dilluted with water and it releases free iodine, which is an effective bactericide and fungicide, it kills bacteria, mould and wild yeast that could spoil your beer.

Preperation: To make an effective no rinse solution it should be diluted to no less than 12.5ppm and no more than 25ppm. (more than 25ppm requires rinsing).

Below are the various dilution rates for the different brands of iodophor to produce solutions of 12.5ppm, they vary with the amount of free iodine in the iodophor product.

Dillution Rates (for 12.5ppm):

Betadine (1% free iodine) dillution is 1.25ml/l .

Videne (is a direct replacement for Betadine), suggest using as Betadine unless new info comes to light.

BTF iodophor (tbc not quoted or analysed) dillution is 0.78ml/l

Brupaks iodophor (analysed at 2.1% free iodine) dillution is 0.6ml/l

Instructions for use: The item being sanitised should be kept wet with an iodophor solution for 30 seconds or more then allowed to drip dry (or almost dry). Hand sprayers are ideal for wetting surfaces to be sanitised by iodophor.

Effectiveness: Iodophor's effectiveness can be approximated by it's colour. As long as the colour hasn't faded from that of the original preparation there is still the required level of iodine available for effective sanitisation.

When making a preparation of iodophor, filtered water is recommended (such as water that has passed through a Brita filter to remove chlorine and chloramines). Iodophor solutions made with filtered water have been shown to maintain their colour and therefore effectiveness for longer.

Tests have shown that the bactericidal activity (effectiveness) greatly reduces with an increase in ph. Solutions at ph 3-5 are significantly more effective than at ph7. If you live in a hard water area it is advisable to add 1 tsp of citric acid to the solution.

Iodophor solutions that are within the recommended ph range maintain their colour and therefore effectiveness for longer.

Brupaks iodohpor has already been acidified, although again people in hard water areas may find 1/2-1 tsp of citric acid is required to bring the ph to within the most effective range.

Cost: Brupaks Iodophor = £4.50 (17/04/08 ) for 250mls
0.6mls/l dillution = 416L of solution
This is also an invaluable article.

http://www.bayareamashers.org/content/maindocs/iodophor.htm

If you are lucky enough to find an iodine/phosphoric acid mix, which quite a lot of dairy sanitizers contain, it is even better. It is like having an iodophor/starsan mix.
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