Matrix standard substance for determining vomitoxin in wheat and preparation method of matrix standard substance

The invention belongs to the technical field of preparation of vomitoxin matrix standard substances in wheat flour, and discloses a vomitoxin residue matrix standard substance in wheat flour and a preparation method thereof, and the preparation method comprises the following steps: 1) inoculating fusarium graminearum, fusarium oxysporum and fusarium moniliforme by using wheat flour, adding sodium metaaluminate and sodium silicate, and fermenting to produce vomitoxin; (2) adding aluminum potassium sulfate and inositol hexaphosphate into the wheat flour for producing vomitoxin after fermentation, uniformly mixing, and removing moisture by using a vacuum freeze dryer; and 3) crushing and uniformly mixing, sterilizing, subpackaging and sealing, and storing in a dark place. According to the method, vomitoxin can be rapidly produced through fermentation, acetylated derivatives of vomitoxin are hardly produced, the vomitoxin does not generate hydroxyl oxidation reaction in the long-term preservation process, the sta