Gas-phase CH-Overtone band spectra of methyl acetate and ethyl acetate via incoherent broad-band cavity-enhanced absorption spectroscopy

•Gas-phase overtone bands of methyl acetate and ethyl acetate were detected.•The S/N ratios of the overtone bands were achieved to be 40–50 by 100 s integration.•Profiles of the overtone bands were recorded to apply environmental monitoring.•These overtone bands were assigned to CH stretching.