Fourier Transform Infrared (FTIR) Analysis and Compliance

Fourier Transform Infrared (FTIR) analysis helps engineers confirm what a material is and what it contains. The method uses infrared energy to measure how a sample absorbs specific wavelengths, which creates a spectral fingerprint. Labs compare that fingerprint to known references to identify polymers, rubbers, coatings, adhesives, and contamination. 

Teams often request FTIR analysis when a part fails, a supplier changes a formulation, or incoming inspection raises questions. The results support material identification, basic composition screening, and rapid troubleshooting. 

Additionally, FTIR analysis also supports both chemical and thermal analysis workflows when projects require a broader picture of material behavior across processing and use conditions. 

Reliable Analysis includes FTIR infrared analysis within its accredited scope, which allows programs to rely on repeatable methods and controlled reporting. Engineers can also pair FTIR with complementary analytical tools when the investigation needs more than one data set. 

​Importance Of Fourier Transform Infrared Testing 

Infrared spectroscopy reduces uncertainty early in a program. Material identification mistakes often drive fit issues, performance drift, premature aging, and supplier disputes. A fast FTIR screen can confirm whether a resin family, elastomer type, or coating chemistry aligns with specifications. 

In addition, Fourier Transform Infrared spectroscopy (FTIR) also supports compliance and quality decisions. When teams document material composition for qualification or corrective action, a clear analytical record helps justify technical decisions and reduces rework. This becomes even more important when manufacturing uses multiple suppliers or global sourcing. 

Scope Of FTIR and How Analysis are Conducted 

Reliable Analysis typically starts with sample intake and a quick evaluation. The lab reviews the sample form, condition, and any history from the engineering team. This step helps select the right FTIR approach and the right sample preparation method. 

Next, the lab prepares the sample to produce a clean, interpretable spectrum. Solid parts may require surface preparation. Thin films or residues may require careful handling to avoid cross contamination. 

The lab then performs infrared spectroscopy under controlled settings. Analysts capture spectra and compare them to reference libraries to confirm polymer, plastic, rubber, elastomer, coating, or adhesive chemistry, and to identify common residues such as oils, process aids, and release agents. 

Next, the lab validates the findings and documents results in a clear report. If deeper characterization is needed, teams can add chemical and thermal methods within the same scope, including DSC, TGA, TMA, HPLC GPC, SEM EDS, and XRF.  

For teams that already run investigations, FTIR also fits naturally into failure analysis lab services because it provides fast material and residue confirmation before more targeted work begins. 

Engineers who want a broader view of materials can also review chemical analysis options that support identification, verification, and root cause workflows across polymers, coatings, and assembled parts. 

Common Testing Standards For FTIR Analysis 

When a program needs additional validation, engineers often combine standards based testing with controlled reporting and supporting methods. For example: 

• DSC testing supports melting, crystallization, and glass transition temperature. 

• TGA testing supports filler content and thermal stability. 

• TMA testing supports coefficient of linear thermal expansion needs when programs evaluate dimensional behavior across temperature. 

ASTM E1252 FTIR analysis 

This standard covers general practices for infrared spectrometry and supports consistent measurement and interpretation. 

ASTM E334 infrared spectroscopy 

This standard addresses infrared spectrometric analysis of materials and helps guide repeatable identification workflows. 

Frequently Asked Questions About FTIR Analysis 

What does FTIR analysis identify best?

FTIR works well for organic materials like polymers, rubbers, coatings, and adhesives. It also identifies many common contaminants and residues. The method works best when the sample surface represents the material of interest. 

Can FTIR quantify composition?

FTIR primarily supports qualitative identification and comparison. In some cases, it can support semi quantitative comparisons when engineers use controlled methods and reference materials. Teams often add XRF material composition testing or other techniques when they need stronger quantitative confidence. 

What sample size does the lab need?

Many FTIR approaches work with small amounts of material. Engineers can send a representative piece, a film, a residue swab, or a focused layer sample. The lab can confirm suitability during sample intake. 

Expert Laboratory Testing For FTIR Analysis 

Reliable Analysis supports engineers who need reliable FTIR analysis and clear reporting. Teams use the lab to confirm materials, investigate failures, and control supplier variation with consistent methods.  

Request a quote to start FTIR analysis, and ask how A+ Reliable Analysis can also support DSC and TGA testing for the same material evaluation. For broader compliance planning, the Applus+ Laboratories network can also support additional testing services that align with program requirements and timelines.