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Journal of Analytical Science and Technology
Fig. 3 | Journal of Analytical Science and Technology

Fig. 3

From: Development of isotope dilution-liquid chromatography tandem mass spectrometry for the accurate determination of vitamin K1 in spinach and kimchi cabbage

Fig. 3

Matrix effect profiles of vitamin K1 (analyte) and vitamin K1-d7 (isotope analog) for the developed method. The profiles were obtained by recording the SRM chromatograms from the LC runs of a spinach and b kimchi cabbage extract with the post-column infusion of an isotope ratio standard solution. A YMC C30 column (150 × 4.6 mm, particle size 3 μm) was used for isocratic elution with methanol/water (96/4, v/v) containing 0.1% formic acid. The solid lines represent vitamin K1, and the dotted lines indicate vitamin K1-d7

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