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Anybody know what (m/m) stands for? in relation to TLC!

http://www.chromforum.org/viewtopic.php?t=12284

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Anybody know what (m/m) stands for? in relation to TLC!

Posted: Wed Feb 17, 2010 8:49 am
by seamoro
Here is the context
"Any spot with solution T is not more intense than the spot with the same Rf obtained with Solution R: The nitrate content 9expressed as potassium nitrate) should be no more than 1 % (m/m)"

Posted: Wed Feb 17, 2010 9:28 am
by GregK
mass/mass? I usually see it as w/w (weight/weight). In context, the spot from solution R represents 1% mass/mass, so the test solution T should be less intense.
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