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Comparison of mass spectrum of the free sugars used to quantify the isotopic enrichments between our previous method (GC–MS) [2], [3] and our new method (LC-HRMS) [1]. GC–MS mass spectrum derivatise of fructose (A), glucose (B), sucrose (C), maltose (D); LC-HRMS mass spectrum of fructose (E), glucose (F), sucrose (G), maltose (H).
