Padilla Sánchez, José A. <br/><br/>
Determination of benzoylmethylecgononine and its metabolites in human hair, using solid-phase extraction and gas chromatography with ion trap mass spectrometry 
by José A. Padilla Sánchez. 
 -  2001. 
 - x, 125 leaves  ill.  29 cm. 
<br/><br/> Typescript.  Thesis (M.S.) -- Pontificia Universidad Católica de Puerto Rico, 2001. 
<br/><br/>Bibliography: leaves 119-125. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hair--Analysis.<br/>Gas chromatography.<br/>Cocaine--Analysis.
<br/><br/><label>Dewey Class. No.: </label>T 363.2563  / P1238d