AN296: Assay of Fuel-Grade Butanol for Total and Potential Sulfate and Total Chloride Per ASTM D7328-07

Instrument Type: IC

Described here is a simple ion chromatography (IC) method to determine total and potential sulfate and total chloride in butanol used as a gasoline additive. It is consistent with the procedure described in ASTM D7328-07, which is intended for the analysis of ethanol samples containing 0.55–20.0 mg/L total sulfate, 4.0–20 mg/L potential sulfate, and 0.75–50.0 mg/L chloride, but can also be applied to butanol samples.

AN290: Determination of Total and Potential Sulfate and Total Chloride in Ethanol According to ASTM Method D 7319

Instrument Type: IC

When combined with gasoline, ethanol increases octane levels and promotes better fuel burning. However, ethanol can be contaminated with chloride and sulfate, which can contribute to plugging and corrosion of automobile engines. This study describes a simple and direct injection IC method to determine total and potential sulfate and chloride in ethanol used as a gasoline additive. This method is consistent with ASTM method D 7319, which is intended for the analysis of ethanol samples containing 1.0–20.0 mg/L of total or potential sulfate and 1.0–50.0 mg/L of chloride.