Proteomic Identification Principles for Fine Animal Fiber Verification
LC-MS/MS tryptic peptide analysis provides species-specific verification of fine animal fibers, overriding optical scale degradation in processed blends.
Proteomics
Protein Analysis
Large-scale analysis of the entire protein complement of a biological sample is used to identify and characterize complex organic materials. The discipline of proteomics allows researchers and quality control labs to analyze the keratin composition of natural textile fibres. This molecular approach offers greater precision than traditional physical and optical testing methods.
Analytical Paradigm
Proteins are extracted from the fabric, digested into smaller peptides and analyzed using liquid chromatography coupled with mass spectrometry. Through proteomics, minor differences in the amino acid sequences of animal keratins are identified. This method remains highly effective even when the fibres have been heavily processed, dyed or damaged.
Traceability Application
Textile testing facilities use this methodology to detect the adulteration of expensive cashmere and camel hair with cheaper wool or synthetic fibres. The presence of tiny amounts of undeclared fibres is easily detected by their unique peptide signatures. This chemical testing is used to verify that raw material claims made by mills match the actual composition of the delivered garments.
It provides an objective and scientifically sound method for enforcing quality standards across global apparel supply chains.
Supply Chain Trust
The final analysis produces a detailed report of the animal species present in the textile sample. Applying proteomics ensures the authenticity of luxury natural fibres and protects brands from fraudulent labelling.