Fiber Materials / Alfa Chemistry
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Fiber Composition Analysis

Fiber composition is an important factor affecting fiber properties. Alfa Chemistry provides fiber composition analysis services, in which the test samples include but are not limited to fibers and fabrics. Our fiber analysis laboratory has a strong technical infrastructure and a team of well-trained and experienced experts.

Optional Service Project

Combined with rich testing experience, our team can provide you with various fiber component identification, qualitative and quantitative analysis services for your samples, and issue corresponding test reports. Qualitative identification and quantitative analysis are two essential steps in textile fiber inspection.

Optional Service Project

  • Fiber Composition Identification
    Common fiber components include cotton, hemp, wool, polyester, polyamide, aramid, polyacrylonitrile, polyurethane, polyphenolic, polyolefin, polylactic acid, ceramic fiber, glass fiber, and carbon fiber, etc.
  • Fiber Qualitative Analysis
    Alfa Chemistry can provide chemical composition/quantitative analysis services for fiber components. Fiber qualitative analysis methods include combustion method, microscope method, dissolution method, nitrogen-containing chlorine-containing color reaction method, melting point method, density gradient method, infrared spectroscopy, and birefringence method. Fiber characterization needs to be confirmed by combining at least 2 methods with each other.
  • Fiber Quantitative Analysis
    Quantitative determination of fiber composition plays an important role in quality control. Quantitative analysis is usually achieved by using the solubility of different chemical components in different solvents. Some commonly used chemical quantitative experimental methods include acetone method, hypochlorite method, sodium zincate method, dichloromethane method, glacial acetic acid method, sulfuric acid method, nitrogen content determination method, xylene method, sulfuric acid method, cyclohexanone method, phenol/tetrachloroethane method, etc.

Our Analytical Technology

  • Microscopic analysis (optical and electron microscopy)
  • Solubility testing (the chemical structure of the polymer in the fiber determines the basic solubility properties of the fiber)
  • Elemental and end group analysis (qualitative and quantitative analysis of chemical elements and groups in fibers can be used for fiber identification and characterization)
  • Spectroscopic analysis (infrared spectroscopy, UV-visible spectroscopy can be used to identify specific chemical functional groups)
  • Burning test (burning test is a quick way to identify certain fibers)
  • Density test (fiber density can be used as an aid in fiber identification)

Common Test Standard

  • ISO 17751-2:2016
  • ISO 17751-1:2016
  • ASTM D629-15
  • ASTM E2224-19

Cooperate With Us

  • Experienced testing and research team
  • Meet customer needs at all stages
  • Efficient and cost-effective services
  • Complete and advanced infrastructure

Advanced Analytical Method

Alfa Chemistry continuously pays attention to the cutting-edge progress in the field of fiber analysis research to ensure the continuous innovation and development of our services. Recent studies report the exploration of a fast green method for the simultaneous determination of four components in blended fabrics by near-infrared (NIR) spectroscopy combined with chemometrics. In this work, both classical partial least squares (PLS) and extreme learning machines (ELM) are used for multivariate calibration and systematic comparisons are made. The performance comparison of the calibrated models is shown in the figure below. [1]

Performance comparison of the compared calibration models.Performance comparison of the compared calibration models.


  1. Hui Chen, et al. Analytical Letters, 2019, 844-857.

Our products and services are for research use only.