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Single‐well Potential Stochastic Resonance Applied to Quantitative Analysis for Weak Chromatographic Signals of Sudan IV

Abstract The single‐well potential stochastic resonance algorithm is applied to enhance signal‐to‐noise ratio of chromatographic signals for trace analysis. Compared with the bistable well potential system, the single‐well simplifies the algorithm since only one system parameter is involved and optimized. Using the signals enhanced by single‐well potential stochastic resonance, the method extended the limit of detection and the limit of quantification of Sudan IV from 0.03 and 0.1 µg/ml to 0.008 and 0.02 µg/ml respectively, and exhibited good linearity, accuracy, and precision, which ensure an accurate determination of the analyte.