Fig. 13

Variables screened of LIBS spectroscopic regression model for amylopectin content across rice samples. (a)paddy rice, (b)brown rice, (c)polished rice, (d)rice flour. The blue indicates that there are no matching element(C/H/O/N/P/S/K/Mg) for the variables. The red represents the element(C/H/O/N/P/S/K/Mg) that can be matched within a certain range (± 0.1). The intensity of color correlates with the frequency of variable