A close dielectric spectroscopic analysis of diesel/biodiesel blends and potential dielectric approaches for biodiesel content assessment

► A close dielectric spectroscopic analysis of diesel/biodiesel blends is presented. ► The dielectric responses from these blends diverge from the classical Debye model. ► The measured conductivity and dielectric constant depend linearly on biodiesel content. ► Dielectric constant-based sensor function in biodiesel content assessment is verified. ► Conductivity-based sensor potentiality for biodiesel content appraisal is presented.