TABLE 1

ESI-MS/MS conditions and calibration ranges for individual analytes

AnalyteRetention TimeESI ModeMRM TransitionScan TimeDPCECXPCalibration Range
minDamsVnM
PHE5.81Positive180.0 → 110.11506129825–5000
APAP1.26Positive152.1 → 110.1130412785–1000
DXM7.13Positive272.3 → 171.115091571425–5000
DXO4.33Positive258.2 → 157.01005153125–1000
MDZ6.97Positive326.7 → 292.1150814185–1000
1′-OH-MDZ7.34Positive342.0 → 203.015051351025–5000
Harmaline (IS)4.89Positive215.2 → 172.1110364316NA
DIC6.93Negative294.0 → 249.8300−55−16−525–5000
4′-OH-DIC6.50Negative309.9 → 265.7200−55−16−75–1000
CLZ5.28Negative167.8 → 131.9200−60−28−525–5000
6′-OH-CLZ3.64Negative183.8 → 119.9150−55−26−75–1000
Warfarin (IS)6.57Negative306.8 → 160.9100−60−28−11NA
  • Analytes were separated on a C18 column prior to positive or negative ESI MRM of each analyte. Calibrators were standard drugs and metabolites spiked in blank CD-1 mouse plasma and processed as described in the Materials and Methods. CE, collision energy; CXP, collision cell exit potential; DP, declustering potential; IS, internal standard; MRM, multiple reaction monitoring; NA, calibration range not applicable to internal standards.