Combining impedance spectroscopy with optical absorption spectroscopy in the UV for biofuel composition measurement. - Luke Middelburg; Mohammadamir Ghaderi; Andre Bossche; Jeroen Bastemeijer; Ger de Graaf; Reinoud F. Wolffenbuttel; Rick Soltis; Jaco H. Visser (I2MTC, 2017)