Low Level Sulphur Analyser

Ultra-sensitive GC solutions for trace sulphur analysis down to ppb and sub-ppb levels,
delivering high selectivity, excellent linearity, and full compliance with international standards.

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High-Precision Low Level Sulphur Analysis

Sulphur compounds such as H₂S, COS, mercaptans and thiophenes are highly corrosive, toxic, and harmful to downstream catalysts and processes. Accurate detection at very low concentration levels is therefore critical across gas, liquid, and liquefied hydrocarbon streams.

The GAS Low Level Sulphur Analyser provides a flexible, high-performance solution for sulphur component analysis using proven GC technology combined with FPD, PFPD, SCD, or GC-MS (AEI) detection. Depending on the required sensitivity, selectivity, and matrix, the analyser can be configured to achieve detection limits from ppm down to <1 ppb, while maintaining excellent repeatability and linearity over multiple decades.

All systems are designed for reliable long-term operation and full compliance with international standards including ASTM, ISO, GPA, UOP, DIN, and EN methods.

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Applications

  • Supported methods:
    ASTM D6228, D5303, D5504, D3328, D4735, D5623,  D7011, UOP791, ISO 19739, ISO 21087
  • Trace Sulphur Analysis in Natural Gas and Fuel Gases
    Detect sulphur components at ppb levels to protect catalysts,pipelines, and downstream processes.
  • Sulphur Determination in Liquid and Liquefied Hydrocarbons
    Analyse LPG, propylene, diesel, and light petroleum liquids using GSV, LSV, SSL, or PTV injection techniques.
  • Olefin Feedstock Quality Control
    Measure ultra-low levels of H₂S, COS (including arsine and phosphine) in ethylene and propylene to prevent catalyst poisoning in polymer production.
  • Refinery and Petrochemical Process Monitoring
    Monitor sulphur impurities in refinery gas, hydrogen streams, and intermediate process gases.
  • Laboratory and Regulatory Compliance Testing
    Perform validated sulphur analysis according to international standaards.

Benefits

  • Flexible Detector Configurations
    Choose FPD, PFPD, SCD, or MS depending on sensitivity and cost requirements – or combine detectors in a single system.
  • Ultra-Low Detection Limits
    Achieve sulphur detection down to <1 ppb with GC-MS (AEI) for the most demanding applications.
  • High Selectivity and Linearity
    Excellent equimolar response and linearity over up to four decades, even in complex hydrocarbon matrices.
  • Automated Calibration and Stable Results
  • Optional Automatic Calibration Unit (ACU) with permeation tubes ensures accurate, reproducible multi-level calibration.
  • Modular and Scalable Design
    Available as a standalone analyser or combined with NGA, RGA, or other GAS analysers for an efficient footprint and lower total cost of ownership.

Questions or get a quote?

Interested in our Low Level Sulphur Analyser? Contact us today for a
personalised quote tailored to your application needs.

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Downloads – Low Level Sulphur Analyser

Access brochures, technical datasheets, application notes, and software updates for Low Level Sulphur Analysers.

Low Level Sulphur Analyser – Flexible GC Solutions

Explore flexible GC configurations for low level sulphur analysis in gaseous, liquid, and liquefied petroleum samples. This document covers FPD, PFPD, SCD, and MS detector options, including integration with NGA and RGA systems for efficient sulphur monitoring.

Download Datasheet

Low Sulphur Analyser using SCD

Discover detailed performance data for ultra-low level sulphur analysis using Sulphur Chemiluminescence Detection (SCD). This application note describes ppb-level detection, excellent linearity, and automated calibration for sulphur analysis in natural gas and hydrocarbon streams.

Download Datasheet

H2S, COS, Arsine, Phosphine in Olefins

Learn how to detect H₂S, COS, arsine, and phosphine in ethylene and propylene at sub-ppb levels.
This application note details a GC-MS (AEI) solution with single-run analysis and automated calibration for critical olefin feedstock quality control.

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CCUS Gas Analyser

CCUS (Carbon Capture, Utilisation and Storage) is considered a critical technology for achieving significant reductions in CO2 emissions, particularly in sectors that are difficult to decarbonise, such as heavy industry and fossil fuel-based power generation.

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Expertise you can rely on

With over 50 years of experience in gas chromatography, GAS delivers advanced analytical solutions for the most challenging sulphur measurements. The Low Level Sulphur Analyser combines sensitivity, robustness, and configurability to support catalyst protection, product quality assurance, and regulatory compliance across the energy and petrochemical industries. Contact our experts to define the optimal configuration for your application.

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