Fig. 1

The TICCs of the prepared SWT and the precursor and product ion spectrum of representative compounds. The TICCs of the prepared SWT are obtained in A positive (ESI⁺) and B negative (ESI⁻) ionization modes. C Product ion mass spectrum of deprotonated molecule [M−H]⁻ of verbascoside at m/z 623.2012. D Product ion mass spectrum of sodium ionization molecule [M+Na]⁺ of paeoniflorin at m/z 503.1535. E Product ion mass spectrum of deprotonated molecule [M−H]⁻ of ferulic acid at m/z 193.0513. F Product ion mass spectrum of deprotonated molecule [M+H]⁺ of senkyunolide A at m/z 193.1227