Fig. 1: Raman scattering and molecular structures of pesticide residues.

Raman ‘fingerprint’ spectra of (I) acephate (II) carbendazim (III) thiamethoxam and (IV) tricyclazole powder, obtained using (a) benchtop Raman microscope and (b) handheld Raman spectrometer (spectra is pre-treated using an advanced-averaging filter). (c) Molecular structures of compounds.