Greige Fabric Certification Scope and Restricted Chemical Testing Protocols
Greige fabric certification demands batch testing of sizing agents, spin finishes, and biocide residues before finishing treatments mask regulated chemicals.
LC-MS MS Screening
Chromatographic Isolation
Analytical separation techniques coupling liquid chromatography with tandem mass spectrometry identify trace organic chemical residues present on treated fabric substrates. Eco-label certification standards require screening finished textiles for banned disperse dyes and perfluorinated water-repellent compounds. Executing LC-MS MS screening allows testing laboratories to detect trace organic contaminants across complex chemical finishes without lengthy manual clean-up procedures.
Triple quadrupole mass analyzers isolate target parent ions before fragmenting them into specific daughter ions for unambiguous compound verification.
Separation Process
Liquid chromatography separation pushes solvent-extracted textile chemicals through a stationary phase column, separating complex organic mixtures based on molecular polarity. Performing LC-MS MS screening provides high chemical specificity, distinguishing structurally similar disperse dye isomers that cause skin sensitisation. High-pressure liquid delivery ensures rapid separation of non-volatile active compounds from background finishing oil residues.
Quantification Precision
Calibration curves constructed from certified reference materials establish quantitative accuracy down to sub-part-per-million levels across diverse fabric substrates. Multiple reaction monitoring modes isolate exact mass transitions, eliminating background noise from complex textile extraction matrices.
Analytical Limit
Thermally unstable organic molecules degrade inside high-temperature ionization sources if electrospray settings exceed recommended voltage thresholds. Highly non-polar wax finishes interfere with liquid chromatographic separation without prior solid-phase extraction clean-up steps.