Page 2 - Shimadzu Nexis SCD-2030

The Next Industry Standard SCD The New Standard in Reliability

The highest stability in its class and excellent equimolar response yields truly reliable results.

The Nexis SCD-2030 is a next-generation sulfur chemiluminescence detection system. High-Efficiency Redox Cell Provides Stable Reactions
™
It has been developed to fulfill the unmet needs of laboratories the world over.
The horizontal redox cell, an industry first, ensures an ample The Redox Cell
The dramatically enhanced sensitivity and reliability, the excellent maintainability, reaction time and reaction zone within the cell, promoting the Ensuring a Wide-Range Reaction Zone Within the Cell
sample’s redox reaction. As a result, it provides highly stable N2 Column
and the automation functions, a first for the industry, will improve laboratory productivity. analyses even when samples are loaded with a high column

flowrate. Additionally, nitrogen gas (makeup gas), which is O2
H2
loaded together with the sample, prevents detector Sample
The New Standard in Reliability contamination due to column deterioration. Outlet Inlet Tube
Outer Pyro-Tube
Inner Pyro-Tube Oxidation Area
Dramatically Improved Productivity Reduction Area
Inert Atmosphere Area
Best-in-Class Sensitivity
Excellent Long-Term Stability

The newly designed high efficiency redox cell enables long-term 1.3
Sulfur Chemiluminescence Detector has the highest sensitivity among all GC detectors. stable analysis. We evaluated the stability of the response for 1.2
four sulfur compounds commonly found in gasoline. 1.1
Concentration Range 1.0
Measurements were performed for a period of 16 days. Stability Relative Response Factor
1 ppb 10 ppb 100 ppb 1 ppm 10 ppm 100 ppm 1000 ppm 1% 10% 100% 0.9
was evaluated by measuring the fluctuations of the target
compound's response in relation to the internal standard 0.8
SCD Sulfur compounds : 10 4 (Diphenyl Sulfide); this is in accordance with ASTM D5623. The 0.7
0 50 100 150 200 250 300 350 400
relative standard deviation for peak area was 1.2% to 1.9%, this
Detectors FPD All compounds aside from He and Ne gas : 10 5 is impressive stability for a SCD. 1-Butanethiol b.p. 98 °C (Day 16)
Analysis time (Hours)
Sulfur compounds : 10 3
BID
Methyl disulfide b.p. 109 °C
Diethyl disulfide b.p. 152 °C
TCD All compounds aside from the carrier gas : 10 5 3-Methylbenzothiophene b.p. 273 °C
Detectable compounds : Dynamic range
High Equimolar Response

The relative area ratio of sulfur compounds was evaluated via
Sulfur Compounds Relative Area Ratio
ASTM D5623, which involves the analysis of sulfur compounds in Thiophene 1.07
gasoline. The area ratio of these compounds to diphenyl sulfide 2-Methyl-1-propanethiol 1.07
was determined and our results show that regardless of Diethyl sulfide 1.03
compound structure, Nexis SCD-2030 gave a similar response. 1-Butanethiol 1.01
Methyl disulfide 0.97
This is desired because we want our detector to give similar or
2-Methylthiophene 1.08
equivalent response (equimolar response) for the same amount
3-Methylthiophen 0.96
of compound regardless of its chemical structure.
Diethyl disulfide 0.97
5-Methylbenzothiophene 0.94
3-Methylbenzothiophene 1.01
Diphenyl sulfide (Internal Standard) 1.00
Using the analytical conditions noted in ASTM D5623, various sulfur compounds
(Each compound has a sulfur concentration of 10 ppm (w/w)) were measured, and the
relative area ratio for each component was calculated with respect to the area value
for diphenyl sulfide. A favorable equimolar response was obtained.