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Table 1 Rate of PC1 score change of 4-CB re-detection spectra and acetone-washed SERS substrate spectra

From: Sensitivity and Reusability of SiO2 NRs@ Au NPs SERS Substrate in Trace Monochlorobiphenyl Detection

4-CB detection order 2nd time 3rd time 4th time 5th time 6th time
Rate of PC1 score change (%) 52.78 44.00 37.55 27.50 33.25
Acetone-washing order 1st time 2nd time 3rd time 4th time 5th time
Rate of PC1 score change (%) 11.02 10.47 6.65 5.52 5.82