[ RadSafe ] observations on iodized salt
grahnk at comcast.net
grahnk at comcast.net
Thu Mar 24 10:36:22 CDT 2011
Since iodine is in the news, relative to Japan, I think the question you are asking is whether the iodine in in iodized table salt is radioactive. The answer is No.
There may be minute amounts of activity in non-lite iodized table salt, because, depending on producer, the iodine (a micronutrient) is added either as potassium iodate or iodide, or sodium iodate or iodide, which is applied as a spray in the production process, and in very small quantities (thanks Wikipedia). If potassium salts are used, there's some K-40, but in small amounts.
In lite salt products, which you accurately describe as a blend of NaCl and KCl, the radioactivity is from the K-40. All of us have comonly used lite salt products in high school radiation demonstrations or for basic radiation safety training course. With a GM pancake probe, there should be no difference between an opened or unopened container, unless someone has been using the open container as a condiment, (or they spilled it). the half life is quite long.
Illinois Emergency Management Agency
Division of Nuclear Safety
opinions are mine and mine alone....yada yada....
----- Original Message -----
From: "John Gerald Center, Jr" <john.center at wmich.edu>
To: "The International Radiation Protection (Health Physics) Mailing List" <radsafe at agni.phys.iit.edu>
Sent: Thursday, March 24, 2011 9:27:13 AM
Subject: Re: [ RadSafe ] observations on iodized salt
I think I didn't start out right. And I am still not sure what I am asking. I and many others voluntarily take in radioactive food sources. Beta and gamma emmiters with greater half lives than Iodine. The concern is the thyroid with iodine if I am not mistaken. Does anyone have a resource I can look to,to see specifically how Iodine is absorbed and the damage it does? John
John G. Center, Jr.
Radiation Safety Officer
3922 Wood Hall
Western Michigan University
1903 W. Michigan Ave.
Kalamazoo, MI 49008-5410
Office (269) 387-5933
Cell (269) 744-0996
E-mail: john.center at wmich.edu
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