Fig. 4
From: Quantitative analysis of cadmium in rice roots based on LIBS and chemometrics methods
Average spectra after pretreatment of root samples with different cadmium concentrations. Comparison of rice root spectral intensities with different cadmium concentrations at Cd II 214.44 nm, Cd II 226.50 nm and Cd I 228.80 nm. a Spectral intensities in the range of 213.00–217.00 nm; b comparison of spectral intensities at Cd II 214.44 nm; c spectral intensities in the range of 224.00–227.00 nm; d comparison of spectral intensities at Cd II 226.50 nm; e spectral intensities in the range of 227.00–230.00 nm; f comparison of spectral intensities at Cd I 228.80 nm