EPA 9076 Test Method for Total Chlorine in New and Used Petroleum Products by Oxidative Combustion and Microcoulometry

EPA Method 9076 is a standardized analytical procedure designed to quantify the total chlorine content in both new and used petroleum products. This includes a wide array of materials such as crankcase oils, hydraulic oils, diesel fuels, lubricating oils, and kerosene. The method utilizes oxidative combustion followed by microcoulometry to measure chlorine concentrations ranging from 10 to 10,000 µg/g. The analytical process involves placing the sample in a quartz boat, which is then introduced into a high-temperature quartz combustion tube. Within this tube, the sample undergoes evaporation and oxidation, converting chlorine compounds into chloride and oxychlorides. These compounds subsequently react with silver ions in a titration cell, and the total current required to replace the silver ions is measured to determine the chlorine content in the sample.

The measurement of total chlorine in petroleum products is of significant importance. Chlorine can have detrimental effects on both the environment and the operational integrity of equipment. High chlorine levels can lead to corrosion and the formation of harmful compounds during combustion, which can damage engines and other machinery. Besides they act as catalyst poisons during further processing. Therefore, accurate determination of chlorine content is essential for ensuring the quality and safety of petroleum products before their use as fuel.

The oxidative combustion and microcoulometry method employed in EPA 9076 provides a reliable and precise measurement of chlorine content, capable of handling a wide range of concentrations. Its capability in detecting chlorine makes it an invaluable tool for environmental monitoring and quality control within the petroleum industry. By ensuring accurate chlorine measurements, this method aids in maintaining compliance with environmental regulations and protects equipment from potential damage caused by high chlorine levels.

With the multi EA 5100, Analytik Jena offers a powerful system for total chlorine determination in organic liquids, solids and gases. It´s convenient coulometric HiPerSens detection in combination with integrated safety features, such as Self Check System, auto protection and heated transfer lines, ensure that a wide concentration range, as required by EPA 9076, can be covered easily.

Sources

• EPA 9076 - Test Method for Total Chlorine in New and Used Petroleum Products by Oxidative Combustion and Microcoulometry