Additionally, the influence of the standard concentration and presence of a sample matrix on the CNL model performance was evaluated, using the same approach. For testing the matrix influence, tea matrix was spiked into the samples at different dilution factors (i.e., no matrix, 100x diluted, and 10x diluted) with varying standard concentrations (i.e., 1, 2.5, 5, 10, 25, 50, 100, 1000 µg/L). Using the selected score and mass tolerance and combining the results with different standard concentrations, a TPr of 95.7, 95.8, and 95.6%, a FDr of 72.2, 72.5, and 78.0%, and a reduction rate of 13.4, 12.5, and 13.0% were obtained for the datasets without matrix, with 100x diluted matrix, and 10x diluted matrix, respectively (Figure ).