ASTM D7359 Standard Test Method for Total Fluorine, Chlorine, and Sulfur in Aromatic Hydrocarbons and Their Mixtures by Oxidative Pyrohydrolytic Combustion followed by Ion Chromatography Detection (Combustion Ion Chromatography-CIC)

ASTM D7359 outlines the procedures for determining the total fluorine, chlorine, and sulfur content in aromatic hydrocarbons and their mixtures. This method covers samples containing 0.10 mg/kg to 10 mg/kg of each element. The method employs oxidative pyrohydrolytic combustion and ion chromatography detection (Combustion Ion Chromatography-C-IC) to measure the concentrations of these elements.

The relevance of the parameters measured in this method lie in their potential impact on both environmental and industrial processes. Fluorine, chlorine, and sulfur are elements that can contribute to emissions, be harmful to catalytic chemical processes, and lead to corrosion. For instance, sulfur compounds can cause corrosion in pipelines and storage tanks, while chlorine and fluorine can poison catalysts used in refining processes. Accurately measuring these elements, ensures that aromatic hydrocarbons meet safety and regulatory standards, important for quality control and research.

Analytik Jena provides standard compliant sample preparation solutions for determination of halides and sulfur in organic matrices. Solid and liquid organic materials are prepared IC-ready by pyrohydrolytic combustion and absorption of the formed hydrogen halides. The resulting solutions can then be analyzed for their halide and sulfur content by any suitable ion chromatograph or alternative ion selective detection methods.

Sources

• ASTM D7359 - Standard Test Method for Total Fluorine, Chlorine, and Sulfur in Aromatic Hydrocarbons and Their Mixtures by Oxidative Pyrohydrolytic Combustion followed by Ion Chromatography Detection (Combustion Ion Chromatography-CIC)