A Direct and Sensitive Method for Determination of 5-Fluorouracil in Colorectal Cancer Cells: Evaluating the Effect of Stromal Cell on Drug Resistance of Cancer Cells

Figure 2

Representative SRM chromatograms for the specificity of 5-FU. (a) Blank sample; (b) blank sample spiked with IS; (c) LLOQ sample; (d) real sample.

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(b)

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(d)