Lumazote Chemical Luminescence Total Nitrogen Analyzer
| Origin | France |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported Instrument |
| Model | Lumazote |
| Pricing | Available Upon Request |
Overview
The Lumazote Chemical Luminescence Total Nitrogen Analyzer is a high-precision, benchtop elemental analyzer engineered for the quantitative determination of total nitrogen in liquid, solid, and gaseous samples using the chemiluminescence detection principle. It operates on the fundamental reaction pathway defined by ASTM D4629, D5176, and D5762: samples are combusted quantitatively in a high-temperature furnace (up to 1000 °C), converting all organic and inorganic nitrogen species into nitric oxide (NO). The resulting NO gas is carried via purified oxygen stream into a dedicated chemiluminescence detector, where it reacts stoichiometrically with ozone (O₃) to produce excited-state nitrogen dioxide (NO₂*). As NO₂* relaxes to its ground state, it emits photons in the near-UV to visible range (peak ~1200 nm), which are detected with high sensitivity and linearity by a photomultiplier tube (PMT). This method delivers exceptional selectivity for nitrogen—free from interference by sulfur, chlorine, or hydrocarbon matrix components—making it ideal for complex petrochemical and polymer matrices.
Key Features
- Triple-range measurement capability: 0.2 ppm to 10% w/w total nitrogen, automatically optimized per sample type and injection volume
- High-temperature programmable combustion furnace (up to 1000 °C) with dual-zone thermal control and quartz combustion tube for complete mineralization of refractory nitrogen compounds
- Dedicated chemiluminescence detector featuring low-noise PMT, temperature-stabilized optical path, and integrated O₃ generator with real-time ozone concentration monitoring
- Independent dual-gas delivery system: one channel for carrier oxygen (with mass flow controller and pressure regulation), second channel for auxiliary purge or calibration gases
- Automated liquid sampling via precision syringe pump with programmable injection speed, volume, and rinse cycles
- Minimal maintenance design: no consumable catalysts, self-diagnostic gas flow sensors, and automated system purging sequences between analyses
Sample Compatibility & Compliance
The Lumazote analyzer accommodates heterogeneous sample forms without derivatization: volatile liquids (e.g., LPG, naphtha), viscous oils (crude, fuel oil), solids (plastics, rubber granules, food powders), and pressurized gases (natural gas, refinery off-gas). Sample introduction is optimized via optional accessories including solid sample boats, high-pressure gas loops, and cryogenic traps for condensable fractions. Regulatory compliance is embedded at the system architecture level: full alignment with ASTM D4629 (liquid hydrocarbons), D5176 (solid organics), D5762 (gaseous fuels), NF EN 12260 (petroleum products), NF M 07-058 (refinery streams), and SH/T 0657 (Chinese petroleum standard). Data integrity meets GLP/GMP requirements through audit-trail-enabled software, electronic signatures, and 21 CFR Part 11–compliant user access controls.
Software & Data Management
Control and analysis are executed via the proprietary Lumazote Control Suite—a Windows-based application supporting method development, sequence programming, real-time chromatogram visualization, and peak integration with baseline correction algorithms. Each analysis generates a timestamped record containing raw signal trace, NO peak area/height, calibration curve coefficients, system pressure/flow logs, and furnace temperature profile. All data are stored in encrypted .lmd binary format with XML metadata, exportable to CSV, PDF, or LIMS-compatible formats (ASTM E1384, ANSI/NIST ITL 10-1). Automated QA/QC functions include bracketing standards, duplicate analysis alerts, drift compensation, and instrument performance verification (IPV) reports compliant with ISO/IEC 17025 clause 7.7.
Applications
- Petroleum refining: nitrogen speciation in crude assays, hydrotreater feed monitoring, and finished fuel certification (jet fuel, diesel, gasoline)
- Chemical manufacturing: nitrogen content verification in solvents, amines, nitrates, and polymer precursors (e.g., nylon-6,6 intermediates)
- Environmental testing: total Kjeldahl nitrogen (TKN) equivalency in wastewater sludge and soil extracts
- Food & agriculture: protein-bound nitrogen quantification in cereals, dairy powders, and animal feed formulations
- Materials science: nitrogen doping assessment in carbon nanotubes, graphene derivatives, and advanced composites
FAQ
What nitrogen species does the Lumazote analyzer detect?
It measures total nitrogen—covalently bound, ionic, and heterocyclic forms—including pyridinic, quaternary, and nitro groups—provided they fully convert to NO under combustion conditions.
Can the system analyze solid samples without homogenization?
Yes; powdered or pelletized solids are introduced via ceramic boats, with optional microwave-assisted pre-treatment for highly cross-linked polymers.
Is ozone generation internal or external?
Ozone is generated on-demand within the detector module using a UV lamp and high-purity oxygen—no external ozone cylinders or scrubbers required.
How is calibration performed?
Using certified liquid standards (e.g., pyridine in xylene) or solid reference materials (e.g., NIST SRM 2781); multi-point calibration curves support both linear and quadratic regression models.
Does the software support remote diagnostics?
Yes; secure TLS-encrypted remote access enables firmware updates, log file retrieval, and real-time sensor diagnostics via authenticated corporate network connections.
