Reliable Sulfur Compounds Analysis in Diesel using Sulfur Chemiluminescence Detector Nexis SCD-2030

User Benefits

�- Sulfur Chemiluminescence Detector (SCD) Nexis SCD-2030 enables the sensitive and selective analysis of sulfur compounds in high matrix petrochemical samples without adverse matrix effects �- Its high reproducibility and excellent recovery ensure reliable detection and quantitation of the sulfur components �- The equimolarity of Nexis SCD-2030 eliminates the need for an individual calibration of target compounds, facilitating the quantitation process for complex mixtures and minimizing calibration standard costs

Introduction

Sulfur compounds are of high importance in petrochemical products. Besides the health risk H2S poses by itself, they are responsible of atmospheric pollutions (SO₂ and SO₃) and are proven to be poison for catalysts used in refining. The sulfur amount in the fuels is steadily decreasing to the higher level of 10 ppm for diesel and gasoline. Since even low sulfur concentrations are harmful, already trace-level identification of potential poisons is essential. This creates the demand for a highly sensitive detector, which can also cope with the high matrix interference seen as the goal is to analyse the undiluted petrochemical sample wherever possible. The detection method of choice is sulfur chemiluminescence detection (SCD): Not only is this technique sensitive and selective to sulfur, but it additionally shows the benefit of equimolar response, which facilitates quantitation of especially complex mixtures as it erases the need for an individual calibration of each target compound. Using the example of diesel matrix, an investigation of petrochemical samples via gas chromatography (GC) combined with sulfur chemiluminescence detector (SCD) is presented. Selectivity, reproducibility, equimolarity and recovery of the setup are examined to judge reliability of the sulfur content determination.

March 31, 2021 GMT