CHN/CHNS Elemental Analysis Testing Services
Elemental or CHN Analysis is a crucial analytical technique used to determine the elemental composition of organic and inorganic samples. It quantifies carbon, hydrogen, and nitrogen content, providing information about chemical structure, purity, and composition. CHN Analysis is applied in various fields like chemistry, environmental science, materials science, and quality control, enabling researchers to characterize and validate diverse substances. It ensures product quality, understands molecular structures, and conducts research in various scientific disciplines.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
CHN Analysis - Overview
Elemental or CHN Analysis is a combustion-based analytical technique used to determine the weight percentages of carbon (C), hydrogen (H), and nitrogen (N) in organic and inorganic materials. The method provides rapid, precise quantification of elemental composition, making it indispensable for characterising polymers, fuels, soil, and biomass.
This service supports research institutions, quality control labs, and manufacturers who require accurate elemental data for material identification, purity verification, and compliance with industry standards.
Scope, Applications, and Benefits
Scope
CHN analysis evaluates:
- Carbon, hydrogen, and nitrogen content (weight %)
- Optional sulfur and oxygen determination (CHNS/O mode)
- Organic and inorganic sample matrices
- Solid, liquid, and volatile sample forms
Applications
- Active ingredient characterisation
- Polymer and resin composition verification
- Soil, sediment, and environmental sample analysis
- Fuel and biofuel quality assessment
- Food and agricultural product testing
Benefits
- Rapid simultaneous multi-element detection
- High sensitivity with microgram-level sample quantities
- Supports regulatory compliance and QC workflows
- Applicable to a wide range of sample types
- Generates reproducible, traceable results
CHN Analysis - Test Process
Sample Preparation
A precisely weighed sample (1–5 mg) is encapsulated in a tin or silver vessel suitable for combustion.
1Combustion
The sample is flash-combusted at 950–1800 °C in an oxygen-rich environment, converting elements to gases (CO₂, H₂O, N₂).
2Gas Separation & Detection
Combustion gases pass through reduction and adsorption columns and are detected using thermal conductivity detectors (TCD).
3Data Analysis
Peak areas are compared against calibration standards to calculate elemental weight percentages and generate the final report.
4CHN Analysis - Technical Specifications
| Parameter | Details |
|---|---|
| Applicable Materials | Organics, polymers, soils, fuels |
| Detection Range | 0.001%–100% for C, H, N |
| Accuracy | ±0.1–0.3% absolute |
| Sample Size | 1–5 mg (solid/liquid) |
| Instrumentation | CHNS/O elemental analyzer |
Instrumentation Used for Testing
- Flash combustion elemental analyser (e.g., LECO, PerkinElmer, Elementar)
- Precision microbalance (±0.001 mg)
- Thermal conductivity detectors
- Calibration reference standards (acetanilide, BBOT)
- Data acquisition and processing software
Results and Deliverables
- Weight % of C, H, and N (and optional S/O)
- Calibration curves and reference data
- Empirical formula estimations
- Pass/fail assessments against specification limits
- Full analytical report with traceability documentation
Why Choose Infinita Lab for Elemental or CHN Analysis?
Infinita Lab is a leading provider of Elemental or CHN Analysis and streamlined material testing services, addressing the critical challenges faced by emerging businesses and established enterprises. With access to a vast network of over 2,000+ accredited partner labs across the United States, Infinita Lab ensures rapid, accurate, and cost-effective testing solutions. The company’s unique value proposition includes comprehensive project management, confidentiality assurance, and seamless communication through a Single Point of Contact (SPOC) model. By eliminating inefficiencies in traditional material testing workflows, Infinita Lab accelerates research and development (R&D) processes.
Looking for a trusted partner to achieve your research goals? Schedule a meeting with us, send us a request, or call us at (888) 878-3090 to learn more about our services and how we can support you. Request a Quote
Frequently Asked Questions
CHN analysis accommodates solids, liquids, and gases in organic and inorganic matrices, including polymers, soils, coal, biomass, and food products.
Typically 1–5 mg of sample is sufficient. Homogeneous samples yield the most accurate results, so proper grinding or mixing is recommended prior to analysis.
Yes. Many elemental analysers offer a CHNS/O configuration that includes oxygen determination through pyrolysis at elevated temperatures.
Commonly referenced standards include ASTM D5291 (hydrocarbons), ASTM E191, ISO 29541, and various methods depending on the industry.
A single analysis typically takes 3–6 minutes per sample.
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