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- W4380291809 abstract "Vitamin K is an essential lipophilic vitamin that acts as a coenzyme in several metabolic pathways. Accurate measurement of apolar metabolites transported by lipoproteins in serum matrices requires high-recovery extractions of vitamin K and its derivatives following standardized protocols. Conventionally developed methods in this field have predominantly employed solid-phase extraction for the measurement of vitamin K and its derivatives. In this study, our objective was to develop an enzyme-assisted extraction method for the precise measurement of vitamin K and its derivatives. Our methodology involved mixing 450 µL of serum samples with 50 µL of an internal standard and 50 µL of a lipase enzyme solution. Following vortexing, the mixture was incubated at 37°C for 15 min to activate the enzymes. The enzyme reaction was subsequently quenched with a mixture of 250 µL of methanol and 1 mL of hexane, followed by centrifugation at 12,000 g for 5 min. The upper phase was collected, concentrated using a concentrator device, and dissolved in a 100 µL solution of methanol/acetone/isopropanol (7:1:1, v/v/v) for analysis. Spectrum analysis was performed using the open-source MZmine 3 software, and a reference interval was established using the Python programming language on the Google Colab platform. The developed method for measuring vitamin K and its derivatives exhibited limit of detection and limit of quantitation values of 0.005 and 0.01 ng/mL, respectively. In conclusion, our study presents a precise and reliable method for the measurement of vitamin K and its derivatives using enzyme-assisted extraction." @default.
- W4380291809 created "2023-06-13" @default.
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- W4380291809 date "2023-06-01" @default.
- W4380291809 modified "2023-10-17" @default.
- W4380291809 title "Measurement of vitamin K and its derivatives in human plasma through enzyme-assisted liquid chromatography-tandem mass spectrometry assay" @default.
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- W4380291809 doi "https://doi.org/10.1177/14690667231183046" @default.
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