Characteristic information extraction method, and rapid detection method and system of organic pollutants in complex system

A system for fast detecting an organic pollutant in a complex system, comprising:

• a surface-enhanced Raman scattering (SERS) response medium configured for enhancing a Raman scattering intensity of the organic pollutant, the SERS response medium comprising:
• a SERS substrate;
• and
• a nucleic acid strand;
• a binding site of the nucleic acid strand is obtained according to a pairing template of the nucleic acid strand;
• and the SERS substrate is site-selectively assembled to the binding site of the nucleic acid strand to obtain the SERS response medium,
• a reaction generating device configured for allowing the organic pollutant and the SERS response medium to react thereon;
• a Raman spectrum detection device configured for collecting a SERS spectrum of the organic pollutant after a reaction occurs on the reaction generating device and configured for sending the SERS spectrum of the organic pollutant to a server;
• and
• the server signally connected to the Raman spectrum detection device;
• the server being configured to perform:
• receiving the SERS spectrum of the organic pollutant sent by the Raman spectrum detection device and obtaining a residual amount of the organic pollutant in response to the SERS spectrum of the organic pollutant;
• obtaining a required wavelength subset of the SERS spectrum of the organic pollutant by:
• dividing a surface-enhanced Raman scattering (SERS) spectrum of an organic pollutant to obtain ω wavelength sub-intervals with overlapping regions;
• wherein P is a positive integer greater than 0;
• screening the ω wavelength sub-intervals to obtain w wavelength sub-intervals;
• wherein ω is a positive integer less than P;
• screening the ω wavelength sub-intervals to obtain a required wavelength sub-interval;
• and
• screening the required wavelength sub-interval to obtain a required wavelength subset;
• obtaining an initial mathematical relationship through establishing a new model for the required wavelength subset and the residual amount of the organic pollutant;
• and
• verifying the initial mathematical relationship, and obtaining a trained mathematical relationship when the initial mathematical relationship meets a preset condition.