The document describes the use of Agilent's dual plasma sulfur chemiluminescence detector (DP SCD) and an online dilutor for the analysis of sulfur compounds. This method achieves detection limits of sulfur compounds at the ppb level. The long-term and short-term stability of DP SCD shows that its performance is stable, and no hydrocarbon interference was found during the analysis of natural gas samples.
The document details a method for analyzing gaseous sulfur compounds according to ASTM D5504. It utilizes an Agilent Dual Plasma Sulfur Chemiluminescence Detector (DP SCD, model G6603A) combined with an online dilutor and a 7890A Gas Chromatograph configured with inert plumbing.
The application investigates the detection limits, stability, and linearity of the system. It demonstrates that the DP SCD achieves ppb-level detection for various sulfur species in natural gas matrices without hydrocarbon interference. The text also compares static and dynamic injection modes and presents data on long-term and short-term stability.
The detection limits for sulfur compounds achieved the ppb level.
The burner vacuum is set to 372 torr and the reaction cell vacuum is 5 torr.
Both injection modes have a linear range from 6.24 to 544.5 ppb.