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Old 12-04-2013, 12:03 AM   #1
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Default Question about Iodophor - What is PPM?

I know I must have forgotten everything learned in high school... But, what the heck is up with these directions?

"For 12.5 ppm titratable iodine: add 1/4 oz per 2 1/2 gal water OR 1 tsp tp 1 1/2 gal water"

OR

"For 25 ppm titratable iodine: Add 1/2 oz per 2 1/2 gal water"

Google says ppm = parts per million

okay so where do I go from here.

how do i figure out what PPM i need to go by?


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Old 12-04-2013, 12:12 AM   #2
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12.5 ppm is effective for no-rinse sanitizing. 25 ppm would potentially be in the range where you'd need to rinse.


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Old 12-04-2013, 07:58 PM   #3
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PPM is "parts per million" and is the ratio of the iodophor to the water in a mixture.

To get to the prescribed concentration you can generally follow the directions on the bottle using common units of measure like gallons, fluid ounces or teaspoons.

To boil it down to the basics, just think of it as 1 ppm concentration equaling 1 drop of iodophor added to 999,999 drops of water.
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Old 12-05-2013, 08:33 PM   #4
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PPM = Parts Per Million.

12.5ppm is no rinse sanitizer, sterile in 30sec, used with 1% solution
25ppm is to be used with 0.7% solution, if memory serves *not sure, I don't use this value*

Easiest way I found to make sure Idophore hits 12.5ppm is a conversion to mL, where 3mL into one US gallon is 12.5ppm (it's actually a little higher than 12.5, but it's dang close and easy to measure). Double that for 25ppm. I use a medical syringe in mL.

I rarely, if ever, need more than 2 gallons of sterilizer.
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Old 12-06-2013, 12:34 AM   #5
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Quote:
Originally Posted by sumbrewindude View Post
PPM = Parts Per Million.

12.5ppm is no rinse sanitizer, sterile in 30sec, used with 1% solution
25ppm is to be used with 0.7% solution, if memory serves *not sure, I don't use this value*

Easiest way I found to make sure Idophore hits 12.5ppm is a conversion to mL, where 3mL into one US gallon is 12.5ppm (it's actually a little higher than 12.5, but it's dang close and easy to measure). Double that for 25ppm. I use a medical syringe in mL.

I rarely, if ever, need more than 2 gallons of sterilizer.
Be careful about following someone else's numbers. My iodaphor is significantly weaker than that out of the bottle, the mfg. recommends 3.5-4.5 grams per liter. Of course, it also costs $1.50 for half a liter, probably much less than the stuff that does the trick at 1/4 the usage rate.
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Old 12-06-2013, 04:30 AM   #6
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Very true.

Always keep an eye on the amount of active iodine in the solution. That's what ultimately determines how much you need to add to reach the effective PPM in solution.

1.50 USD for a half liter? Yeah, your's was cheaper than my 4oz bottle
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Old 12-06-2013, 05:27 AM   #7
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Quote:
Originally Posted by sumbrewindude View Post
Very true.

Always keep an eye on the amount of active iodine in the solution. That's what ultimately determines how much you need to add to reach the effective PPM in solution.

1.50 USD for a half liter? Yeah, your's was cheaper than my 4oz bottle
Sometimes it's nice to live in China. I buy it from an online brewshop here. It's marketed to the medical industry, but it does the trick. I still wish I could get StarSan here, though; I'd be willing to pay a premium, but it's just not available.
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Old 12-06-2013, 01:55 PM   #8
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Quote:
Originally Posted by FatDragon View Post
Sometimes it's nice to live in China. I buy it from an online brewshop here. It's marketed to the medical industry, but it does the trick. I still wish I could get StarSan here, though; I'd be willing to pay a premium, but it's just not available.
What does the food processing industry use over there for sanitizing equipment and work areas?

It seems like the commercial food processing industry would have suppliers for these types of cleaning products, (acidic cleaners with pH modifiers)
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Old 12-06-2013, 02:13 PM   #9
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Quote:
Originally Posted by saeroner
I know I must have forgotten everything learned in high school... But, what the heck is up with these directions? "For 12.5 ppm titratable iodine: add . . . 1 tsp to 1 1/2 gal water"
This is what you want. To make your no-rinse sanitizing solution add 1 teaspoon of Iodophor to 1.5 gallons of water. I usually double it and make 3 gallons and add 2 teaspoons. I love Iodophor, it's easy to use, easy to measure, straightforward.
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Old 12-06-2013, 06:21 PM   #10
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Why do you guys make up so much Iodophor solution? I make 2 pints in a spray bottle and spray anything I need to sanitize. The surfaces just need to be wetted, not soaked.


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