Determination of Total Chlorine in Hydraulic Fluids

This technical report details the methodology for determining total chlorine content in various hydraulic fluids using coulometric titration after high-temperature combustion. The report begins by outlining the challenges associated with analyzing hydraulic fluids, particularly those containing high levels of phosphorous-organic compounds. It describes the multi EA 5100 system, which employs controlled horizontal combustion and an Auto-Protection system to prevent system damage and ensure accurate detection sensitivity. The report explains the sample preparation process, including the use of calibration standards and the automatic sample introduction system. It further details the combustion process, which involves a bi-phasic digestion at high temperatures, and the subsequent analysis of chlorine content. Results from multiple hydraulic fluid samples are presented, highlighting the effectiveness of the method in achieving reliable measurements. The report concludes by emphasizing the advantages of the multi EA 5100 system in enhancing sample throughput and operational safety in chlorine analysis.