Benchtop UV Fluorescence Sulfur Analyzer
Benchtop UV Fluorescence Sulfur Analyzer – ToronFSA™ 5453
ToronFSA™ 5453 is a fully automatic ultraviolet fluorescence sulfur analyzer for the precise determination of total sulfur content in petroleum products, crude oil, hydrocarbons, engine fuels, liquefied petroleum gas (LPG), and petrochemicals. Combining high-temperature combustion with UV fluorescence detection, this sulfur analyzer delivers high sensitivity, low noise, a wide linear measurement range (0.05 mg/L – 10000 mg/L), strong anti-interference capability, and stable results that meet or surpass the performance of comparable instruments.
The ToronFSA™ 5453 features a 136-position fully automatic vertical injector, a membrane dryer system that replaces traditional magnesium perchlorate desiccants, an intelligent auto-switching cooling fan, precision gas flow control, and flexible single-point and multi-point calibration with auto-generated curves. It complies with ASTM D5453, ASTM D4239, SH/T 0689, and equivalent international standards, making it a fully compliant sulfur analyzer for both regulatory testing and quality control.
Benchtop UV Fluorescence Sulfur Analyzer – ToronFSA™ 5453 Applications
- Total sulfur determination in refined petroleum products including gasoline, diesel, jet fuel, and heating oil
- Sulfur analysis in crude oil, crude oil fractions, and vacuum residues
- Sulfur content measurement in hydrocarbons, engine fuels, and liquefied petroleum gas (LPG)
- Ultra-low sulfur fuel (ULSF) compliance testing for regulatory and specification requirements
- Sulfur monitoring in petrochemical process streams and intermediate products
- Research and development of sulfur removal processes, hydrodesulfurization (HDS) optimization, and fuel formulation
- Environmental monitoring and emissions compliance testing for sulfur in fuels
- Quality control in refinery laboratories, fuel distribution, and blending operations
Standards & Compliance
- ASTM D5453: Standard Test Method for Determination of Total Sulfur in Light Hydrocarbons, Spark Ignition Engine Fuel, Diesel Engine Fuel, and Engine Oil by Ultraviolet Fluorescence
- ASTM D4239: Standard Test Method for Sulfur in the Analysis Sample of Coal and Coke Using High-Temperature Tube Furnace Combustion Methods
Benchtop UV Fluorescence Sulfur Analyzer – ToronFSA™ 5453 Key Features
- Versatile application: suitable for sulfur analysis in refined oils, crude oil, hydrocarbons, engine fuels, LPG, and petrochemicals
- Advanced combustion system with blind-end quartz cracking tube ensuring thorough sample combustion and high detection accuracy
- Precision gas flow control with stabilized gas path pressure fluctuation prevention and automatic shutdown protection if gas pressure exceeds safe limits
- Intelligent cooling: auto-switching cooling fan for low-noise, hassle-free thermal management during continuous operation
- High-performance UV fluorescence components: UV fluorescence detector, photomultiplier tube (PMT), and UV lamp for superior stability and long-term accuracy
- Innovative membrane dryer system replacing traditional magnesium perchlorate desiccant, significantly reducing maintenance requirements and consumable costs
- 136-position fully automatic vertical injector with auto-sampler functions including automatic cleaning, bubble elimination, standard curve plotting, and adjustable sampling speed to minimize human error
- Flexible calibration: supports single-point and multi-point calibration with automatically generated calibration curves
- Wide linear measurement range: 0.05 mg/L to 10000 mg/L total sulfur with 0.01 mg/L minimum detection limit
- High repeatability: ≤0.5% for 0.05–1.0 mg/L; ≤4% for 1.0–10 mg/L; ≤5% (× sample concentration) for ≥10 mg/L
- Fast analysis: approximately 3 minutes per sample for high-throughput petroleum sulfur testing
- Baseline drift ≤ 5 mV/min for stable, long-duration test sessions
- Data interface: RS232 or USB for direct PC connection and LIMS data transfer
Theory and Method
The ToronFSA™ 5453 employs the ultraviolet fluorescence (UVF) detection method per ASTM D5453. A liquid sample (5–50 µL, fully combustible) is injected by the 136-position automatic vertical injector into a blind-end quartz cracking tube within the advanced combustion system, where it is combusted at temperatures up to ambient + 1150°C under oxygen-rich conditions (O₂ purity ≥99.999%, ≤0.2 MPa; Ar purity ≥99.999%, ≤0.2 MPa).
Sulfur-containing compounds in the sample are converted to sulfur dioxide (SO₂) and trace sulfur trioxide (SO₃). The combustion gases pass through a precision gas flow controller and a membrane dryer — which removes water vapor without the maintenance burden of magnesium perchlorate — before entering the UV fluorescence detector.
In the detector, SO₂ molecules absorb UV radiation and are excited to a higher energy state; upon returning to the ground state, they emit characteristic fluorescence photons detected by a high-sensitivity photomultiplier tube (PMT). The PMT signal is proportional to the SO₂ concentration, which is directly related to the total sulfur content of the original sample. The instrument generates a calibration curve automatically from single-point or multi-point standards, with adjustable sampling speed for optimized peak resolution and throughput.
Benchtop UV Fluorescence Sulfur Analyzer – ToronFSA™ 5453 Technical Specifications
| Parameter | Specification |
|---|---|
| Standards | ASTM D5453, ASTM D4239 |
| Measurement Range | 0.05 mg/L – 10000 mg/L |
| Minimum Detection Limit | 0.01 mg/L |
| Precision | ± 1 °C (temperature control range: ambient to 1150 °C) |
| Repeatability | 0.05–1.0 mg/L: ≤ 10%; 1.0–10 mg/L: ≤ 4%; ≥10 mg/L: ≤ 5% (× sample concentration) |
| Temperature Control Range | Ambient to 1150 °C |
| Sample State | Liquid |
| Sample Volume | 5 – 50 µL (must be fully combustible) |
| Analysis Time | Approx. 3 minutes per sample |
| Baseline Drift | ≤ 5 mV/min |
| Injector | 136-position fully automatic vertical injector |
| Gas Requirements | O₂: ≥99.999% purity, ≤0.2 MPa; Ar: ≥99.999% purity, ≤0.2 MPa |
| Data Interface | RS232 or USB |
| Power Consumption | ≤ 3000 W |
| Main Unit Size (W × D × H) | 600 × 500 × 500 mm |
| Auto-Sampler Size (W × D × H) | 300 × 240 × 460 mm |
| Voltage | AC 220 V ± 10%, 50 Hz ± 10% (110V is also available) |
| Relative Humidity | < 80% RH |
| Ambient Temperature | 10 – 28 °C |
| Other Notes | No strong vibration, airflow, strong electromagnetic interference, or corrosive gases near instrument |