Focused Protein Analysis
Specialized protein analysis focuses on a predefined set of marker peptides to quantify specific animal species within complex textile blends. Using targeted proteomics, laboratories can identify and measure the exact percentages of cashmere, sheep wool, and yak hair in a single yarn sample. This method bypasses the thousands of non-essential proteins to focus only on diagnostic signatures.
Adulteration Safeguard
Retail brands use this approach to defend their supply chains against the introduction of cheaper animal fibers. Because targeted proteomics looks for specific, stable peptide markers, it cannot be fooled by chemical treatments that alter the physical appearance of the wool. This makes it a highly reliable tool for verifying fiber content in premium garments.
Testing Protocol
The analysis begins with the chemical digestion of the textile sample to release the target peptides. Once the digest is injected into the mass spectrometer, the system is programmed to monitor only the specific precursor and product ion transitions. This focused scanning maximizes the signal-to-noise ratio and ensures that even low-level contaminants are detected.
It provides a highly sensitive and robust method that can operate effectively even when the sample contains residues from heavy industrial dyeing.
Technical Advantage
Compared to discovery-style proteomics, this targeted method is faster and provides much more consistent results across different batches. It allows laboratories to run high-throughput screening of incoming shipments during busy fashion seasons. This speed helps garment manufacturers make quick, data-driven decisions about their raw materials.
