Comparison of Sensitivity for Sulfur Compound Species by Nexis™ SCD-2030: Equimolar Sensitivity Measurement

Introduction

The Sulfur Chemiluminescence Detector (SCD) has the characteristic of linear response in proportion to the number of sulfur atoms (S atoms) introduced into the detector. Accordingly, the SCD is known to display the same sensitivity (i.e. equimolar sensitivity) regardless of compound species as long as the same number of S atoms (i.e. S mol number) is introduced. Furthermore, if 2 or 3 S atoms exist in a compound, the sensitivity of the SCD increases linearly by 2 or 3 times corresponding to the total number of S atoms introduced into the detector. This equimolar sensitivity characteristic becomes particularly useful when sulfur compounds to be quantitated have unknown structures. For example, the SCD can be applied to quantitative analysis where the total number of S atoms in a sample is measured. This article examined the equimolar sensitivity characteristic for multiple sulfur compounds, using a Shimadzu Nexis^TM SCD-2030. In addition, a comparison experiment was conducted with another selective and highly sensitive detector for sulfur the Flame Photometric Detector(FPD(S)).

June 15, 2023 GMT