Chromate and Mordant Dye Residue Analysis
topic
Chrome mordant dye residue analysis quantifies total chromium and Cr(VI) content in wool textiles traditionally dyed with metal complex mordant dyes, using sequential extraction with water, acid, and oxidising agents followed by ICP-OES for total chromium and colorimetric diphenylcarbazide assay for hexavalent chromium to assess both bioavailable and total chrome residues.
Role
Addresses the specific chromium contamination pathway from chrome mordant wool dyeing processes where incomplete reduction of dichromate mordant to the less toxic Cr(III) form leaves carcinogenic Cr(VI) residues in finished wool fabrics subject to REACH restrictions and OEKO-TEX chromium limits.
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