A simple contactless impedance probe for determination of ethanol in gasoline

• Published in: Analytica chimica acta Vol. 694; no. 1; pp. 57 - 60
• Main Authors: Opekar, F., Čabala, R., Kadlecová, T.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 23.05.2011; Elsevier
• Subjects: Analytical chemistry; Chemistry; Chromatographic methods and physical methods associated with chromatography; Contactless impedance detection; Dielectric constant; Ethanol; Ethyl alcohol; Exact sciences and technology; Gas chromatographic methods; Gasoline; GC–MS; Impedance probes; Mathematical analysis; Multivibrators; Permittivity; Planar cell; Spectrometric and optical methods; Tubular cell; Tubular cell; Planar cell; GC–MS; Ethanol; Contactless impedance detection; Gasoline; Sample; Standard; Concentration; Probe; GC-MS; Gas chromatography; Additive; Frequency; Limit; Pretreatment; Detection; Reliability; Impedance; Capacitor; Permittivity; Mass spectrometry; Non contact measurement

A contactless impedance probe with either a planar or a tubular detection cell has been developed and tested for rapid determination of the ethanol content in gasoline. The probe cell is connected as a capacitor determining the frequency of an electronic astable multivibrator. The multivibrator freq...