Analysis of total inorganic sulphate in bioethanol
A
Metrohm (UK) product story
Edited by the Laboratorytalk editorial team
Aug 1, 2007
An important quality criterion in the popular biofuel is the sulphate content of bioethanol, because sulphates from deposits in the engine and may contribute to sulphuric acid emissions
Biofuels are fast becoming an alternative renewable energy source.
Bioethanol is already used for combustion engines mainly in two ways: hydrous ethanol (95%) as gasoline substitute and anhydrous (or dehydrated, 99%) ethanol blended with conventional fuels in proportions of between 5 and 85 percent (E85).
The sulphate content of this ethanol is easily determined by titration with Metrohm's 809 Titrando with a Pb2+ crystal membrane ion selective electrode as the indicator electrode, the system being controlled by Tiamo software.
This titration is based on the precipitation of lead sulphate, whereby the equivalence point Pb2+ crystal membrane Ion selective electrode.
This method is performed with Metrohm equipment fulfils the requirements of international standardised test procedures as mentioned in the new ASTM D4806-06c at the highest level of quality.
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