Vat and Sulfur Dye Reduction Byproduct Testing
topic
Vat and sulfur dye byproduct analysis detects sulfide residues in sulfur-dyed textiles using potentiometric titration and headspace hydrogen sulfide measurement, and identifies thiosulfate and polysulfide oxidation products in washing effluent by ion chromatography; aniline detection by GC-MS addresses the specific risk of aniline formation from indigo vat dye reductive cleavage in denim fabrics.
Role
Characterises the chemical safety and wastewater toxicity profile of sulfur and vat dyed fabrics, addressing both consumer safety concerns from skin-contact sulfide migration in poorly washed denim and environmental concerns from highly oxygen-demanding sulfur compound discharges in textile dyehouse effluents.