Hexavalent Chromium Detection in Leather and Textiles
topic
Hexavalent chromium extraction uses phosphate buffer at pH 8 to selectively dissolve Cr(VI) from textile and leather specimens, with colorimetric detection using 1,5-diphenylcarbazide reagent at 540 nanometres by UV-Vis spectrophotometry; ISO 17075 and EN 196 protocols define extraction conditions and the 3 milligram per kilogram regulatory limit.
Role
Critical for compliance testing of chrome-tanned leather accessories attached to textiles, as Cr(VI) formed by oxidation of Cr(III) tanning agents is a potent skin sensitiser and carcinogen regulated under REACH Annex XVII with a 3 milligram per kilogram limit in leather articles.
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