The invention discloses a method for detecting the
copper content in rice based on the single-pulse
laser-induced breakdown spectrum technology. The method includes the steps that 1, the rice is soaked with a
copper solution, after the rice is dried at
room temperature,
grinding and sieving are carried out, and the rice is pressed into tablets through a tablet press; 2,
laser-induced breakdown spectrum data X of various test samples is acquired; 3,
flame-
atomic absorption spectroscopy is selected to measure the real content Y of
copper in the samples with various concentrations; 4, according to the corresponding relation between wavelengths and elements, original LIBS spectrum data is searched for
wave crest intensities X1 corresponding to Cu I 324.754 nm and Cu I 327.396 nm; 5, after abnormal samples are removed, data X2 is obtained; 6, the data X2 is preprocessed, and a
data set X3 is obtained; 7, by means of
linear fitting, X3 serves as input, Y serves as output, and a
linear regression model is established; 8, the
linear regression model is used for carrying out quantitative analysis on the copper content in a certain number of samples, and the accuracy of the model is verified.