Method for rapidly detecting whether total acid of brewed vinegar is qualified

The invention provides a method for quickly detecting whether total acid of brewed vinegar is qualified or not, which comprises the following steps: (1) taking a brewed vinegar original sample a, anddecolorizing to obtain a decolorized vinegar sample b; (2) taking a decolored table vinegar sample b containing V2mL of the brewed table vinegar original sample a, dropwise adding an indicator into the decolored table vinegar sample b, then adding V3mL of 0.58285 mol/L unitary strong base solution into the decolored table vinegar sample b, gently and uniformly shaking, observing the color of the solution, wherein when the solution shows the acid color or the acid-base equivalent point of the indicator at the moment, the mixed color of the acid color and the base color of the indicator is shown, the sample is qualified if the color does not fade within half a minute, and the solution shows the base color of the indicator and the sample is unqualified if the color does not fade within half aminute; v2=V3. The result