Use of unconventional mixed Acetone-Butanol-Ethanol solvents for anthocyanin extraction from Purple-Fleshed sweetpotatoes

•Type of solvent used strongly influences ratios of peonidin, cyanidin extracted.•Mixed dilute ABE solvents yielded anthocyanins comparable to 80% methanol.•Phase formation with varied butanol concentration show different anthocyanin yields.•Temperature driven anthocyanin degradation with acetone increases phenolic content.•PSP preparation as fresh or flour can change anthocyanin yield for a given genotype.