Lc ms grade 0.1 formic acid

Optima LC/MS grade methanol (MeOH), LC/MS grade 0.1% formic acid in water, LC/MS grade formic acid ampules, optima grade dichloromethane (DCM), optima LC/MS grade isopropanol (IPA), hydrochloric acid HCl, tert-butyl methyl ether, (MTBE), and hexane were purchased from Fisher Scientific. Ammonium hydroxide (NH4OH was purchased from Sigma. DOA analytical standards: (+/-) amphetamine, (+/-) methamphetamine, cocaine, benzoylecgonine, morphine, phencyclidine, (-) delta9-THC, (+/-) amphetamine -D5, (+/-) methamphetamine -D5, cocaine -D3, benzoylecgonine -D3, morphine -D3, phencyclidine -D5, and (-) delta9-THC -D3 were obtained as 1mg/mL solutions from Cerilliant (Round Rock, TX, USA). Interfering substances: Diphenhydramine HCl, Alprazolam, Dihydrocodeine, S-Nicotine, Caffeine, Cortisol, -Cotinine, Dextromethorphan, Ibuprofen, Naproxen, Prednisone, R-Pseudoephedrine, Amobarbital, Propranolol, Nicotinamide, Carbamazepine, Clobazam, Clonazepam, Valproic Acid, Verapamil, and Sertraline were purchased from Cerilliant (Round Rock, TX, USA). Stabilization buffer was purchased from Immunalysis (Pomona, CA). The Raptor Bipheyl LC column; 2.7um, 100mm x 2.1mm was purchased from Restek (Bellefonte, PA). Isolute SLE+ columns were purchased from Biotage (Charlotte, NC). The PRESSURE+ 48 positive pressure manifold was obtained from Biotage (Charlotte, NC).