now that’s pure!

December 15, 2010 at 11:54 am | | everyday science, great finds

That’s very pure EDTA:

100.06% pure!


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  1. We had specs at (a big pharma company I worked at after I graduated undergrad)’s QC labs where we certified the quality of some products to be between 99.9-100.1% pure. These things were typically tested via autotitration methods, and the output was a percentage which, with error, would regularly exceed 100%. So, some of you kids were taking Prozac (or whatever drug it was…) that had constituents coming out of vats more than 100% pure….

    Fun Fact.

    Comment by Jeremiah — December 15, 2010 #

  2. it’s anti-homeopathy! the higher the concentration the LESS effective the chemical is!

    Comment by rob — December 16, 2010 #

  3. This is quite usual way how to express assay when determined using an external standard (which is hardly 100% pure).

    Comment by Petr — December 22, 2010 #

  4. Even 99.4 might be a too optimistical…

    Comment by Dan — January 27, 2011 #

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