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. Author manuscript; available in PMC: 2014 Jun 18.
Published in final edited form as: Anal Chem. 2013 Jun 5;85(12):5632–5636. doi: 10.1021/ac401056q

Figure 2.

Figure 2

a) Quantitation of imatinib in blood at 50, 200 and 1000 ng/mL using capillary samplers of the same nominal length but various ranges of lengths. Capillaries were coated with imatinib-d8 (from 100 ng/mL methanol solution) as internal standard. b) Intensity ratios of fragment ions through the reactions of imatinib (m/z 494→ m/z 394, 200 ng/mL) and imatinib-d8 (m/z 502 → m/z 394, 100 ng/mL), paper spray of DBS prepared using an IS coated capillary sampler (top) and pre-mixing the IS using pipetting (bottom).