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Therapeutic Drugs in Urine on Raptor Biphenyl by LC-MS/MS
*An extracted ion chromatogram (XIC) of the isobars is presented in the inset

LC_CF0579
Column | Raptor Biphenyl (cat.# 9309A5E) | ||||||||||||||||||||||||
Dimensions: | 50 mm x 3.0 mm ID | ||||||||||||||||||||||||
Particle Size: | 2.7 µm | ||||||||||||||||||||||||
Pore Size: | 100 Å | ||||||||||||||||||||||||
Guard Column: | Raptor Biphenyl EXP 5 mm, 3.0 mm ID, 2.7 µm (cat.# 9309A0253) | ||||||||||||||||||||||||
Temp.: | 40 °C | ||||||||||||||||||||||||
Sample | Therapeutic drug custom mix | ||||||||||||||||||||||||
Conc.: | A 50-500 ng/mL standard was prepared in urine. 100 µL of the 50-500 ng/mL urine standard was diluted with 900 µL water prior to analysis (10x dilution). | ||||||||||||||||||||||||
Inj. Vol.: | 20 µL | ||||||||||||||||||||||||
Mobile Phase | |||||||||||||||||||||||||
A: | 2 mM ammonium formate and 0.1% formic acid in water | ||||||||||||||||||||||||
B: | 2 mM ammonium formate and 0.1% formic acid in methanol | ||||||||||||||||||||||||
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Detector | ABSCIEX API 4000 MS/MS | ||||||||||||||||||||||||
Ion Source: | TurboIonSpray® | ||||||||||||||||||||||||
Ion Mode: | ESI+ | ||||||||||||||||||||||||
Mode: | Scheduled MRM | ||||||||||||||||||||||||
Instrument | API LC-MS/MS | ||||||||||||||||||||||||
Notes | 1. Lorazepam was prepared at 500 ng/mL; all other analytes are 50 ng/mL. 2. Doxepin is an isomeric mixture (cis:trans, 15:85) and results in two peaks. The trans form is the primary isomer peak. |
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