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CAN118: Determination of Trace Sodium in Diesel and Biodiesel Fuel

Instrument Type: IC

Sodium determination in diesel fuel using inductively coupled plasma-optical emission spectrometry (ICP-OES) is possible; limits of detection are ~0.1 ppm. The goal of this study was to develop and test an alternate approach using IC for the determination of cations in diesel fuel. The approach focused on the use of commercially available modules and existing standard chromatographic conditions. The challenge was to design an automated, cost-effective, fast, and sensitive method that can provide 10–100 times greater sensitivity than ICP-OES method and does not require manual extraction steps.

Determination of Halogens and Sulfur in Refuse Derived Fuel by Combustion Ion Chromatography

Instrument Type: IC

Refuse Derived Fuel (RDF) is a fuel produced by shredding and dehydrating solid waste deriving largely from municipal waste. Because RDF is used as fuel for power plants and boilers, it is important to know the halogen and sulfur content as an indication of the potential for formation of corrosives or environmental contaminants. By using a combustion ion chromatography (CIC) system consisting of the automatic quick furnace AQF-2100H and an ICS-1600 ion chromatograph, the concentrations of halogens and sulfur can be determined accurately and quickly.

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.

AN201: Determination of Chloride and Sulfate Methanol Using Ion Chromatography

Instrument Type: IC

This application note presents a simple and direct approach for determining chloride and sulfate in methanol using a Reagent-Free™ IC system with eluent generation (RFIC-EG™ system). Chloride and sulfate are determined in less than 12 min using an IonPac® AS24 column with an electrolytically generated potassium hydroxide eluent and suppressed conductivity detection. The linearity, limits of quantitation, and precision of chloride and sulfate determination in methanol are demonstrated. This RFIC-EG system method delivers a fast and automated assay of chloride and sulfate in methanol.