Compound | Ionization Mode | m/z | Mobile Phase | Gradient Condition (B Concentration) | |
---|---|---|---|---|---|
A | B | ||||
Digoxin | ESI (−) | 779.4→649.2 | 0.02% Aqueous ammonia | Acetonitrile | 0 min; 20%→0.5 min; 20%→1 min; 65%→3 min; 65%→4.5 min; 20%→7 min; 20% |
Digitoxin (IS) | 763.5→633.2 (IS) | ||||
Fexofenadine | ESI (+) | 502.4→466.2 | 0.1% Formic acid | Acetonitrile | 0 min; 18%→1 min; 18%→4 min; 90%→6 min; 90%→6.3 min; 18%→10 min; 18% |
Loratadine (IS) | 383.4→337.1 (IS) | ||||
Etoposide | ESI (+) | 606.2→229.0 | 0.1% Formic acid + 2 mM ammonium formate | Acetonitrile | 0 min; 15%-→0.8 min; 15%→3 min; 85%→5 min; 85%→5.5 min; 20%→9 min; 15% |
Fexofenadine (IS) | 502.4→466.2 (IS) |
ESI, electrospray ionization; IS, internal standard.