title: Determination at the nanogram range of rilatinic acid in urine after ion-pair extraction.
abstract: Ion-pair extraction and extractive alkylation of urine allows a simple, rapid, and very sensitive detection by TLC as well as EC-GLC tecnhiques, of rilatinic acid in small urine samples after the oral intake of therapeutic doses of methylphenidate.
mesh_terms: D000478:Alkylation; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006801:Humans; D008774:Methylphenidate / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000652:urine
chemical_list: D008774:Methylphenidate