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Urinary organic acid

http://www.chromforum.org/viewtopic.php?t=17331

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Urinary organic acid

Posted: Wed Aug 03, 2011 11:25 am
by chandra
Hello,
Is that ok to use a single internal standarad for all urinary organic acids.

Re: Urinary organic acid

Posted: Wed Aug 03, 2011 11:41 am
by Don_Hilton
It all depends. If extraction efficiencies can vary, the quality of results can vary if a single internal standard is used. My preference with urine is to use labeled compouds for all analytes and to spike them into the urine.
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