With Iodophor Solutions
Iodophor is effective at a concentration of at least 12.5 PPM, and at
that strength, is an effective sanitizer with a contact time of one minute.
Generally, the rule is to add 3 capfuls of Iodophor to a 5 gallon container
of tap water. Test for maintenance of solution strength.
FDA code 2001-4-501-114 (B) states that an iodine solution
shall have a:
Minimum temperature of 24°C (75°F)
pH of 5.0 or less or a pH no higher than the level for
which the manufacturer specifies the solution is effective, and
Concentration between 12.5 PPM and 25 PPM
Some of the more modern Iodophor preparations are not pH
sensitive, as they contain acids to keep the pH low.
Iodophor is the least toxic of the common sanitizers, and
can be used with confidence in settings where toxicity is an issue.
The best way to use
Iodophor as a routine sanitizer is to really understand what is needed
in terms of strength. This is why using our
AQA 1227 Iodophor test kit is the key to really doing it the right
Iodophor is used widely in the beverage industry, as it
is very effective on glass and metal containers. It has a tendency to
stain, so it is not used as a general, non-food-contact sanitizer or on
surfaces that are susceptible to staining. It is the least corrosive
of all sanitizers, so its use on food preparation equipment may be
recommended for that reason.
The standard for Iodophor mixing
is 25 PPM. Almost all food service suppliers that provide at least one
brand of Iodophor sanitizing
concentrates. Each one needs testing to be sure that appropriate
concentration has been achieved.
Using the test kit is simple:
Place the roll back in the dispenser so that you can
tear off strips of the paper for testing
Use the Iodophor mixing guidelines to mix your
Iodophor concentrate solution
TEST to make sure that the solution is strong enough to
Make sure that your Iodophor solution is at least 12.5
PPM (or other appropriate concentration) using the color reference chart
(but aim for 25 PPM)
If the solution is is below 12.5, add more quat
If the solution is obviously above 25, you should dilute
down to some number below that value
Why Use Test Strips?
The answer is simple: you don't
always get Iodophor solutions of the right strength, even if you follow mixing
instructions. Generally, concentrated Iodophor is very stable, but
solutions that are stored may loose potency in a matter of days, especially
with different pH and air exposure.
look for Iodophor solutions to have at least 12.5PPM
concentration. Best practice requires a full 25PPM.
Higher amounts are not toxic, but simply cost more to maintain.
Appropriate levels can only be confirmed by test strips.
Be sure that you are aware of the
type of Iodophor you are using. Some require pH within the 2
to 5 range for effectiveness.
How to Mix and Use Iodophor Solutions
There are many different types of Iodophor concentrates, so
there are no general guidelines for mixing. Most commercial containers
will describe in detail how to mix the compound to a certain concentration,
but it is always best to mix, then test.
|Iodophor must not be used
directly with soaps or detergents. An intermediary hot
rinse step is necessary if quats are used for immersion sanitation
has no cleaning capability like some sanitizers. A
pre-cleaning step is usually required for food contact surfaces.
A standard for time of exposure is 1 minute for most
sanitizers, but Iodophor seems to have a more rapid effect. Iodophor
has the most significant "residual effect" so quick dipping can be quite
Here is a guideline for mixing
and using Iodophor solutions:
Test to Minimum PPM
/ If High
|Pots, Pans, Dishes and Utensils
Mix according to
|Non-staining Food Contact Surfaces
Mix according to
|Food Processing Equipment
Mix according to
(or use higher concentrations to treat,
then rinse, then final wipe or spray with lower concentration)
Clearly, it is difficult for any
food preparation operation to "get it right" without some simple