Fig. 6From: Quantitative analysis of cadmium in rice roots based on LIBS and chemometrics methodsRelationship between the reference Cd content and prediction Cd content of different models: a univariate analysis of Cd II 226.50 nm after pretreatment; b univariate analysis based on the characteristic input variable of polynomial fitting of I214.44 nm after pretreatment; c ELM model of three Cd spectral lines after pretreatment; d ELM model of full spectrum after pretreatmentBack to article page