Inert Gas Fusion Oxygen-Nitrogen-Hydrogen Elemental Analyzer

What is the Inert Gas Fusion Oxygen-Nitrogen-Hydrogen Elemental Analyzer?

An inert gas fusion elemental analyzer melts metals and ceramics in a graphite crucible at 2000–3000 °C and detects oxygen, nitrogen, and hydrogen. It is the standard tool for gas content in steel, titanium, and ceramics.

Overview

This platform places a 0.05–1 g sample in a graphite crucible between two electrodes inside a helium-flushed furnace. High current heats the crucible to about 2500–3000 °C, releasing oxygen as CO, nitrogen as N2, and hydrogen as H2. CO is detected by infrared, optionally after conversion to CO2, and N2 and H2 are measured by thermal conductivity cells after chemical scrubbing. Detection limits of 0.1 ppm are typical under clean conditions, and ranges extend to percent levels for oxygen and nitrogen in ceramics. Analysis takes 1–3 minutes. The instrument needs helium at 99.995% purity, cooling water, and a power supply of 3–8 kW, and uses graphite crucibles as consumables. It provides total gas content from the bulk of the sample, not the surface layer. Calibration uses certified metal and oxide reference materials.

How does it work?

Elemental analyzers decompose a sample completely, so the element of interest can be measured regardless of its chemical form. Combustion systems burn organic samples in oxygen at about 1000 °C and detect CO2, H2O, N2, and SO2 by thermal conductivity or infrared cells. Inert gas fusion melts metals and ceramics in graphite crucibles, releasing oxygen as CO, and nitrogen and hydrogen as N2 and H2. Induction furnace analyzers combust metals in oxygen and detect CO2 and SO2 by infrared. For liquid fuels, UV fluorescence detects SO2 excited at about 215 nm and chemiluminescence detects nitric oxide reacting with ozone. Combustion ion chromatography absorbs halogen gases into solution and separates the anions on an ion-exchange column. All methods are calibrated against certified standards and require blank control.

What are the key features?

• Impulse furnace reaches 2500–3000 °C for complete release of gases.
• Infrared and thermal conductivity channels measure O, N, and H independently.
• Detection limit of about 0.1 ppm under clean conditions.
• Analysis in 1–3 minutes including crucible outgassing.
• Graphite crucible consumables supplied in controlled blank lots.

What are the technical specifications?

A typical inert gas fusion oxygen-nitrogen-hydrogen elemental analyzer configuration offers elements measured of O, N, H, oxygen range of 0.1 ppm–5%, nitrogen range of 0.1 ppm–3%, hydrogen range of 0.05 ppm–0.5%, sample mass of 0.05–1 g and furnace temperature of 2000–3000 °C. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Inert Gas Fusion Oxygen-Nitrogen-Hydrogen Elemental Analyzer is used in steel and alloy gas content control, titanium and reactive metals, ceramic powder analysis and additive manufacturing powder qualification. Across the wider Elemental Analyzers class, laboratories also deploy it for materials composition verification, petroleum and fuel quality testing and polymer and electronics halogen screening.

Which standards and certifications apply?

Relevant standards and methods include ASTM E1019, ASTM D5373, ASTM D5453, ASTM D4629, ISO 10304-1, ASTM D7359, ISO/IEC 17025 and IEC 61010-1. Certification candidates for this model are CE and ISO 9001 manufacturing; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Elemental analyzers require stable power, clean dry gases of 99.99–99.999% purity, and exhaust extraction for SO2 and combustion gases. Microbalance-based systems need a vibration-free bench and temperature stability within about 2 °C. Calibrate with certified reference materials at installation, after maintenance, and at defined intervals, and run check standards at the start of each batch. Consumables such as combustion tubes, crucibles, and traps have defined lifetimes based on sample count. Samples must be homogeneous, dry, and free of surface contamination. Laboratories under ISO/IEC 17025 or GLP should keep calibration records, balance certificates, and maintenance logs, and validate methods on matrix-matched standards. Electrical safety of laboratory equipment is commonly assessed to IEC 61010-1.

How do I select the right Inert Gas Fusion Oxygen-Nitrogen-Hydrogen Elemental Analyzer?

Select this platform when oxygen, nitrogen, or hydrogen in metals or ceramics is the target. It cannot measure carbon or sulfur in a practical way. In an RFQ, specify gas ranges, matrix, sample form, autosampler, and standards such as ASTM E1409 or ASTM E1447.

How does it compare with other Elemental Analyzers variants?

Choose by the element and matrix rather than by instrument name. Organic powders needing C, H, N, S call for a flash combustion analyzer, and metals needing oxygen, nitrogen, or hydrogen need inert gas fusion. Carbon and sulfur in steel and minerals call for an infrared induction furnace analyzer. Sulfur and nitrogen at mg/kg levels in liquid fuels call for UV fluorescence and chemiluminescence analyzers. Total halogens and sulfur in polymers, electronics, or waste point to combustion ion chromatography. Next specify concentration range, sample mass, required standards, autosampler capacity, and throughput. Ask suppliers for repeatability on reference materials representing your matrix, and confirm consumable requirements such as crucibles, catalysts, reagents, and high-purity gases, since these often dominate operating costs.