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™
SCD-2030. In addition, a comparison experiment was
conducted with another selective and highly sensitive
detector for sulfur the Flame Photometric Detector(FPD(S)).