ASTM E1252: Infrared IR FTIR Spectroscopy Testing Services
ASTM E1252 recommends techniques for performing Qualitative analysis by Infra-Red (IR) spectroscopy while ASTM E168 deals with quantitative aspects including computer-based and manual calculations. Molecules that absorb infra-red radiation can be detected by their characteristic IR spectra.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
What Is ASTM E1252 Infrared IR FTIR Spectroscopy?
ASTM E1252 and ASTM E168 are standardized practices for infrared (IR) spectroscopy, which can be carried out using Fourier Transform Infrared Spectroscopy (FTIR).
FTIR is based on the principle that molecules absorb infrared radiation at specific frequencies corresponding to their chemical bonds and functional groups. The absorbed infrared radiation is transformed from the time domain to the frequency domain using a Fourier Transform. The obtained spectrum is then used to identify molecular structures based on a reference spectral database.
ASTM E1252 specifies general practices for IR spectroscopy in the mid-IR region (4000 cm⁻¹ to 50 cm⁻¹) and can also be applied in the near-IR region. ASTM E168 specifies recommendations for quantitative analysis, such as preparation, calibration, and calculation methods.
Applications and Benefits of ASTM E1252 Infrared IR FTIR Spectroscopy Testing
Scope
ASTM E1252 applies to the following IR techniques:
- Transmission
- Attenuated Total Reflection (ATR)
- Diffuse Reflectance (DRIFTS)
- Specular Reflectance
Applicable frequency range:
4000 cm⁻¹ to 50 cm⁻¹ (mid-infrared)
Also applicable above 4000 cm⁻¹ (near-infrared region)
ASTM E168 provides guidance for quantitative IR analysis including sample preparation and calibration methods.
Applications
- Identification of unknown organic and inorganic compounds
- Polymer characterization
- Functional group analysis
- Contamination detection
- Quality control testing
- Failure analysis
- Coating and thin film evaluation
- Research and development of complex molecular systems
- Gas and liquid analysis
Benefits
- Rapid and non-destructive testing
- Accurate molecular identification
- Detection of impurities and contaminants
- Suitable for solids, liquids, and gases
- Minimal sample preparation (especially with ATR)
- Applicable to polymers and complex materials
- Standardized testing methodology
- Supports regulatory and quality compliance
Our ASTM E1252 Testing Procedure
Sample Placement
Prepare and position sample (Transmission / ATR / DRIFTS / Reflection).
1IR Interaction
IR beam interacts with sample; detector records signal.
2Fourier Transform
Interferogram converted to frequency-domain spectrum.
3Spectral Analysis
Spectrum compared with reference database for identification.
4ASTM E1252 Test Parameters and Requirements
| Parameter | Details |
|---|---|
| Frequency Range | 4000–50 cm⁻¹ (mid-IR); applicable above 4000 cm⁻¹ (near-IR) |
| Output Format | % Transmission vs Wavenumber (cm⁻¹) spectrum |
| Analysis Type | Qualitative and Quantitative |
| Data Requirement | Reference spectral database |
| Applicable Phases | Solids, Liquids, Gases |
- FTIR spectrometer
- IR source
- Interferometer
- ATR crystal (for ATR method)
- DRIFTS accessory (for diffuse reflectance)
- Specular reflectance accessory
- Sample holders and pellets press (for transmission)
- Spectral database software
- Data analysis software
Equipment and Instrumentation Used for ASTM E1252 Testing
What You Receive: Test Report, Data, and Certification
- FTIR spectrum (% transmission vs wavenumber)
- Functional group identification
- Molecular fingerprint analysis
- Contamination detection report
- Quantitative concentration data (if applicable under ASTM E168)
- Comparative spectral matching results
ASTM E1252 Infrared IR FTIR Spectroscopy FAQs
ASTM E1252 testing is used for qualitative identification and characterization of materials using infrared spectroscopy. It can help identify functional groups and compare an unknown sample's IR spectrum with spectra from known reference materials.
ASTM E1252 applies to liquid, solid, and vapor-phase samples. The appropriate IR sampling technique—such as transmission, reflection, or other applicable approaches-is selected based on the sample characteristics.
The standard covers infrared spectra from approximately 4000 to 50 cm⁻¹. It can also be useful for measurements at frequencies above 4000 cm⁻¹ in the near-infrared region.
Yes. IR qualitative analysis can be performed by identifying characteristic functional groups and comparing the spectrum of an unknown material with spectra from known reference materials. For reliable comparisons, spectra should be obtained using the same technique and under comparable conditions.
ASTM E1252-based infrared analysis is useful for polymers, plastics, coatings, chemicals, composites, adhesives, oils, and other organic or inorganic materials where material identification or qualitative characterization is required.
Why Choose Infinita Lab for Infrared IR FTIR Spectroscopy Testing
At the core of this breadth is our network of 2,000+ accredited laboratories across the USA, offering access to over 10,000 testing methods and analytical services. From advanced materials characterization (SEM, TEM, RBS, XPS) to mechanical, chemical, environmental, biological, and standardized ASTM/ISO-compliant testing, we deliver unmatched flexibility, specialization, and scale. You are never limited by geography, facility, or methodology — Infinita Lab connects you to the right expertise and testing solution, every time.
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