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
1. IODOSEM-500S shampoo
with 5% of Iodine;
pH 3,00
-Based on molecular iodine. For disinfection
of equipment, instriments, surfaces, skin; protects from usual bacteriums, fungi, spores and viruses. Working solution 0,006-2% in water, depending on means of disinfection.
2. DEZISEM
-Based on stabilysed percloracetic acid, wich
doesnt foam, for use in industry of alcoholic drinks and mineral water
3. SEMI CHLOR CH
Calcium hipochlorit with 68-72% active Cl
It has long stability, easy soluble, with a little
rest especially well for soft water. It can be used for preparation of drink water; working with it is not dangerous.
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