Mass Spectrometry Proteomic Profiling for Fine Animal Fiber Verification
LC-MS/MS proteomic profiling quantifies species-specific keratin peptide markers, bypassing optical scale damage to verify fine animal fiber purity.
Liquid Chromatography Separation
Analytical Mechanism
Differential partitioning of chemical analytes between a liquid mobile phase and a solid stationary phase isolates chemical components within textile extracts. Liquid chromatography separation isolates disperse dyes, banned azo colorants, finishing agents, and restricted chemical residues extracted from textile substrates. The analytical technique governs chemical safety compliance and eco-testing verifications, applying to dissolved organic extracts and stopping when inorganic metal elements or volatile gases require gas phase separation.
High-performance liquid chromatography systems utilize pressurized solvent pumps and packed micro-particle columns to achieve molecular resolution.
Column Interaction
Stationary phase chemistry, such as hydrophobic C18 bonded silica, retains non-polar analytes while polar solvents flush unbound matrices. Gradient elution varies solvent polarity over time to resolve complex chemical mixtures. Temperature control within column ovens maintains reproducible retention times.
Detection Method
Ultraviolet-visible spectrophotometers and mass spectrometers detect eluted compounds as distinct chromatographic peaks. Retention times matched against certified reference standards confirm analyte identity. Peak area integration quantifies trace chemical concentration in parts per million.
Regulatory Screening
Global apparel regulations enforce strict limits on carcinogenic arylamines derived from azo dyes. Liquid chromatography separation provides definitive evidence for compliance with international chemical safety standards. Accredited laboratories execute sample extractions using standardized solvent systems before chromatographic analysis.