Briefly, 1 g of the PSP powder containing internal standard, cyanidin-3,5-diglucoside, was extracted with 20 mL 5% formic acid water on an orbital shaker at 40 C for 12 h and centrifuged (4000g, 20 min, 4 C).
Briefly, 1 g of thePSP powder containing internal standard, cyanidin-3,5-diglucoside,was extracted with 20 mL 5% formic acid water on an orbitalshaker at 40 C for 12 h and centrifuged (4000g, 20 min, 4 C).