Shimadzu creates next-generation sulphur chemiluminescence detection system

The new system is designed to improve laboratory productivity through enhanced sensitivity, reliability and maintainability

The Nexis SCD-2030 is a next-generation sulphur chemiluminescence detection system. It has been developed to fulfil the unmet needs of laboratories worldwide.

With the enhanced sensitivity, reliability, maintainability and the automation functions – a first for the industry – the Nexis SCD-2030 is intended to improve laboratory productivity.

High-efficiency redox cell provides stable reactions

The horizontal redox cell, an industry first, ensures an ample reaction time and reaction zone within the cell, promoting the sample's redox reaction. As a result, it provides highly stable analyses even when samples are loaded with a high column flowrate. Additionally, nitrogen gas (makeup gas), which is loaded together with the sample, prevents detector contamination due to column deterioration.

Excellent long-term stability

The newly designed high efficiency redox cell enables long-term stable analysis. Shimadzu evaluated the stability of the response for four sulphur compounds commonly found in gasoline. Measurements were performed for a period of 16 days. Stability was evaluated by measuring the fluctuations of the target compound's response in relation to the internal standard (Diphenyl Sulfide); this is in accordance with ASTM D5623. The relative standard deviation for peak area was 1.2% to 1.9%, impressive stability for a SCD.

High equimolar response

The relative area ratio of sulphur compounds was evaluated via ASTM D5623, which involved the analysis of sulphur compounds in gasoline. The area ratio of these compounds to diphenyl sulfide was determined and the results showed that regardless of compound structure, Nexis SCD-2030 gave a similar response. Shimadzu intends the detector to give a similar or equivalent response (equimolar response) for the same amount of compound regardless of its chemical structure.

Additonal benefits include:

  • Easy pyro-tube replacement
  • Reliable and effective automation functions are a first for the industry
  • Automatic conditioning (ageing) function
  • Automatic notifications to replace consumables
  • Significantly reduced instrument startup time

The Nexis SCD-2030 can be controlled seamlessly with LabSolutions software.

It is well known that the SCD gives the highest sensitivity for sulphur compounds among the existing detection methods. By incorporating an ultrashort flow path and a high efficiency redox cell, the Nexis SCD-2030 further raises the bar for sulphur chemiluminescence detection.

Quantification of sulphur compounds in gasoline is very important. The Nexis SCD-2030 offers linear sensitivity with respect to sulphur compounds and since it is unaffected by hydrocarbons coexisting in diesel fuel, it is capable of highly accurate analysis.

In combination with the HS-20 headspace sampler, the Nexis SCD-2030 can quantify fragrant sulphur components in beverages. Sulphur compounds play an important role as trace fragrant components in foods. While sulphur compounds heighten the flavour and aroma of foods, excess quantities will lead to bad odours. Additionally, they are used as additives to prevent putrefaction and to control oxidation.

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