Technical Overview & Analytical Methods for Elemental Analysis
Elemental analysis quantifies the fundamental chemical building blocks—carbon, hydrogen, nitrogen, sulfur, and oxygen—across inorganic and organic matrices. For inorganic materials such as steel, cast iron, cement, and ores, samples undergo high-frequency induction furnace combustion in pure oxygen, transforming carbon to CO2 and sulfur to SO2 for detection by solid-state non-dispersive infrared (NDIR) sensors. For organic samples, flash dynamic combustion coupled with thermal conductivity detection (TCD) provides simultaneous CHNS separation.
Measurement Principles & Technology
- High-Frequency Induction Combustion: Delivers rapid, clean heating exceeding 2200°C in an oxygen stream to ensure total release of bound carbon and sulfur.
- Non-Dispersive Infrared (NDIR) Detection: Solid-state infrared cells equipped with optical filters measure specific absorption bands for low-ppm and high-percentage concentrations.
- Inert Gas Fusion (IGF): Refractory metals in graphite crucibles are melted in helium or argon carrier gas to extract oxygen as CO/CO2, nitrogen as N2, and hydrogen as H2.
- Flash Dynamic Combustion: Organic CHNS matrices are combusted at 1050°C with an oxygen pulse, chromatographically separated, and quantified via high-sensitivity TCD.
International Standards & Regulatory Compliance
Standard Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt Alloys
Industry benchmark for metallurgical quality control and foundry testing.
Standard Test Method for Sulfur in the Analysis Sample of Coal and Coke Using High-Temperature Tube Furnace Combustion
Essential for environmental emissions compliance and fuel grading.
Steel and Iron — Determination of Total Carbon and Sulfur Content
International standard for infrared absorption after combustion in an induction furnace.
Standard Test Methods for Determination of Carbon, Hydrogen and Nitrogen in Analysis Samples of Coal and Carbon in Coke
Organic elemental characterization of solid fossil fuels.
Core Industrial Applications
Steel Mills & Foundries
Fast melt chemistry verification, verifying ultra-low carbon in automotive steels, and sulfur inclusion monitoring.
Mining & Ore Beneficiation
Quantifying total sulfur in iron ore, bauxite, limestone, and base metal concentrates.
Chemical & Polymer Research
CHNS empirical formula confirmation, pharmaceutical purity testing, and catalyst characterization.
Environmental Testing
Soil carbon sequestration studies, total organic carbon (TOC), and organic pollutant monitoring.
Laboratory Selection Checklist
Why Laboratories Across India Partner with Orbit Technologies
Established in Hyderabad in 1995, Orbit Technologies manufactures and represents world-class scientific instruments. As Parr Instrument Company's exclusive partner and #1 Global Dealer for new orders, we provide full end-to-end support: from testing application guidance and custom engineering to factory-certified installation, NABL-traceable calibration, and lifetime spares.
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Common Technical Questions: CHNS/O Analyzers
Key questions on testing standards, operating methods, maintenance, and calibration.