Fig. 6A illustrates that under the experimental conditions, even in the larger anode current (240 mA), microwave itself did not cause the degradation of PSPY. However, even in microwave with small anode current (60 mA), microwave can assist H2O2 in the degradation of PSPY (Fig. 6B). Meanwhile, the effects of microwave on the degradation of PSPY were verified with the Maillard reaction results. Linear regression analysis of Fig. 6B shows that, under these conditions there was a good linear dependence (r > 0.98) between intrinsic viscosity and degradation time for both water bath and microwave heating. The degradation process rule of PSPY is similar to microwave degradation of -carrageenan, which contains a sulfate and 3, 6-anhydrogalactose unit in its structure similar to that of PSPY. Therefore, a degradation consistency between the two polysaccharides was observed.