CAN77204: Determination of Formic and Acetic Acids in Petroleum Products by Ion Chromatography

Instrument Type: IC

Organic acids in crude oil, fuel, etc., are one of the biggest concerns of the oil, oil refining, and car manufacturing industries. Because of their corrosive properties and the associated costs of corrosion, organic acids have become a topic of great industrial interest. Ion chromatography (IC) can be used for the determination of low molecular weight organic acids in aqueous or water-miscible matrices. This application note summarizes the use and evaluation of an automated IC method for the direct determination of acetate and formate in diesel, oil, and diesel/oil mixtures.

AU161: Determination of Sulfate and Chloride in Ethanol Using Ion Chromatography

Instrument Type: IC

This application is an improved method for determining sulfate and chloride in ethanol using IonPac AS22 column and carbonate/bicarbonate eluent. In this method, the AS Autosampler performs a direct inject on a TAC-ULP1 anion concentrator, installed in place of the injection loop, and then washes off the ethanol. This method allows the use of electrolytic suppression in the recycle mode for the highest level of convenience and good sulfate stability even when 20 mg/L of sulfate is spiked into gasoline- denatured ethanol. The method determines if the ethanol meets ASTM Specification D 4806.