Screening of pesticide residues in Traditional Chinese Medicines using modified QuEChERS sample preparation procedure and LC-MS/MS analysis.

•108 pesticides in Traditional Chinese Medicines were determined simultaneously.•Traditional Chinese Medicines are difficult matrices for residue analysis.•C18 and anhydrous MgSO4 were used as the dSPE sorbent.•92% of real samples were detected with pesticide residues.•Paclobutrazol showed a high residue level in O. japonicas.