<<Disclaimer: Verify this information before applying it to your situation.>>

Had the following question about ppm, and attempted to 
answer it as follows.

-----

  Megan,
  in food how would that work out ?
  
  1/8 tsp. in __________ cups of flour for example?
  
  Paula in Pa.

-----

A cup of flour weighs about 110 grams. So there are 9 cups 
per Kg flour, roughly.

Flour, cornstarch, confectioners' sugar, and other 
powdered ingredients have a density of approximately 9 
grams (1/3 ounce) per tablespoon (as opposed to 15g per 
tablespoon for most other denser ingredients).

Since there are ~ 3 teaspoons per tablespoon, it follows 
that there are ~ 3 grams flour per teaspoon.

So we can apply the mg/Kg = 1 ppm conversion.

1 kg = 9 cups flour, and 1 mg = 0.00333 tsp flour.

1 ppm = 0.00003704 tsp per cup flour.

or, in more practical terms:

1 ppm = 1/8 tsp (0.125 tsp) per 3,375 cups flour.



Dr. Megan Tichy
Lecturer, Texas A&M University
3255 TAMU, Department of Chemistry
College Station, TX 77843-3255

*Support summarization of posts, reply to the SENDER not the CELIAC List*
Archives are at: Http://Listserv.icors.org/SCRIPTS/WA-ICORS.EXE?LIST=CELIAC