Abstract
A sensitive liquid chromatography-electrospray ionization-tandem mass spectrometric (LC-ESI-MS/MS) method for the determination of the rat brain 5alpha-androstane-3alpha,17beta-diol (3alpha,5alpha-Adiol) has been developed and validated. The brain extract was purified using solid-phase extraction cartridges, derivatized with isonicotinoyl azide, and subjected to LC-MS/MS. The method was accurate and reproducible, and the limit of quantitation was 0.1 ng/g tissue when a 100-mg tissue sample was used. The change in the brain 3alpha,5alpha-Adiol level by immobilization stress was also analyzed using the developed method.
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