LC/MS (TOF) Analysis of Antiarrhythmic Drugs and Metabolites on Ascentis® Express HILIC: Improvement in Analyte Response after Solid Phase Extraction (SPE) using HybridSPE®-Phospholipid
Materialien
Analytische Säule
SPE-Röhrchen oder -Platte
Standard
Amiodaron -hydrochlorid -Lösung
1.0 mg/mL in methanol (as free base), ampule of 1 mL, certified reference material, Cerilliant®N-Desethylamiodarone hydrochloride solution
1.0 mg/mL in methanol (as free base), ampule of 1 mL, certified reference material, Cerilliant®(±)-Flecainide solution
1.0 mg/mL in methanol, ampule of 1 mL, certified reference material, Cerilliant®Lidocaine solution
1.0 mg/mL in methanol, ampule of 1 mL, certified reference material, Cerilliant®CONDITIONS
sample preparation
SPE (Solid Phaes Extraction)
sample
rat plasma was spiled directly from stock standard to a level of 400 ng/mL
SPE tube/cartridge
HybridSPE-Phospholipid 96-Well Plate, 50 mg/2 mL (575656-U)
sample addition
apply 100 μL of plasma to plate, followed by 300 μL of 1% formic acid acetonitrile. Agitate via vortex for 4 min
elution
place on vacuum manifold and apply 10" Hg vacuum for 4 minutes. Collect filtrate and analyze directly.
column
Ascentis Express HILIC, 10 cm x 2.1 mm I.D., 2.7 μm particles (53939-U)
mobile phase
[A] 5 mM ammonium formate; [B] 5 mM ammonium formate in acetonitrile; (5:95, A:B, pH 7.0 with formic acid)
flow rate
0.4 mL/min
pressure
1305 psi (90 bar)
column temp.
35 °C
detector
ESI(+), full scan, m/z 100-1000
injection
0.5 μL
sample
plasma extract, analyte concentration of final sample work-up is equivalent to 100 ng/mL
Beschreibung
Hinweis zur Analyse
The basic characteristics of antiarrhythmic cardiac drugs and associated metabolites make them targets for HILIC chromatographic separation. HILIC mobile phases consist of a high composition of acetonitrile which facilitates the direct analysis of precipitated plasma samples without the need for additional sample solvent exchange. In most cases, the high organic mobile phase also increases analyte response with ESI(+) MS detection. This application used HybridSPE-Phospholipid sample prep to remove phospholipids and precipitated proteins prior to LC/MS analysis on Ascentis Express HILIC. These chromatograms compare the response with HybridSPE-Phospholipid vs. standard protein precipitation sample prep methods. The highest grade solvents provided clean, robust operation. Cerilliant CRMs provided reliable quantification.
Rechtliche Hinweise
Ascentis is a registered trademark of Merck KGaA, Darmstadt, Germany
HybridSPE is a registered trademark of Merck KGaA, Darmstadt, Germany