Figures of the Article

• Effect of different mobile phases on the intensity of the MTX response
• Optimization results of MS/MS parameter
• Extracted ion chromatograms of MTX by QLIT-6610MD
• Extracted ion chromatograms of MTX by AB QTRAP 6500+
• Extracted ion chromatograms of blank serum (a) and serum containing control (100 μg/L) (b)
• Plot of Bland-Altman analysis of actual serum samples
• Results of actual serum samples
• MS³ extracted ion chromatogram of MTX by QLIT-6610MD