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Displaying 1-5 of 6 results for Tag: Ethanol

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Determination of Potential Chloride and Sulfate in Denatured Ethanol Samples Using a Compact Ion Chromatography System

Instrument Type: IC

This method shows the direct determination of potential chloride and sulfate in a peroxide-treated denatured ethanol sample, previously published in Application Update 194. In this record, the method is executed on an Integrion IC system.

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.

AN71410: Ion Chromatography: A Versatile Technique for the Analysis of Beer (Part C: Alcohol Analysis)

Instrument Type: IC

This application note describes the use of ion-exchange or ion-exclusion chromatography for the determination of five classes of compounds of interest to the brewing industry, including: carbohydrates, alcohols, organic acids, inorganic anions, and inorganic cations. One of two forms of electrochemical detection is used, pulsed amperometry or conductivity detection. This part of the application note describes the alcohol analysis which uses pulsed amperometric detection. This was formerly Dionex AN46.

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.

AN175: Determination of Sulfate and Chloride in Ethanol by Ion Chromatography

Instrument Type: IC

This application note describes the simplest, most direct method to measure mg/L concentrations of chloride and sulfate anions in ethanol. Sulfate and chloride are determined in 15 min by using IC with eluent generation and suppressed conductivity detection, on either an IonPac AS14A or IonPac AS18 column. The method is sensitive enough to monitor compliance with ASTM Specification D 4806. The methods described here were validated by Dionex during participation in the ASTM interlaboratory collaborative study to determine precision and bias for the new Standard Test Method.