Sulfate Content Determination in Bioethanol by Potentiometric Titration

A proven method for sulfate determination is potentiometric titration with lead nitrate using a Pb-selective electrode. The pH of the sample is adjusted to pH 3...5 with perchloric acid and the sulfate is then precipitated out with lead nitrate solution. The Pb-selective electrode detects the first excess of lead ions at the equivalence point.

Titrators by Metrohm

The wide range of potentiometric applications for biofuels requires a highly flexible titrator. No other titration system offers more flexibility and working comfort than the Titrando.

• With Touch Control, the PC Control software or tiamo™ – titration and more – operation is child’s play.
• The space-saving Dosino technology with numerous liquid-handling functions simplifies sample preparation and allows automatic preparation and emptying of burets without operator intervention – it is no longer necessary to handle organic solvents.
• Intelligent Dosing Units and electrodes eliminate confusion. Extensive GLP functions guarantee safe and error-free work.
• The Titrando is unbelievably flexible – it covers the whole range from a simple stand-alone titrator up to a fully automatic titration system with sample changer, direct balance connection and barcode reader.

Product information

• Brochure: Quality Assurance of Biofuels with Metrohm instruments (pdf)
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