Abstract: Lanaset is activated by the bromide containing acrylamide groups of wool with reactive dyes and metal complex dyes mixed in order to understand Lanaset chromium dyes for dyeing wool residues, microwave digestion pretreatment to HNO3 + H2O2 (5 +2, V / V) as a digestion reagent, using graphite furnace atomic absorption (GFAAS) method, to establish a simple, sensitive and accurate cashmere in the GFAAS determination of trace amounts of chromium . Set the temperature of the sample digested ash 1100 ℃, experimental atomization temperature of 2300 ℃. The results show that the minimum detectable concentration of chromium is 0.22 μg / L, relative standard deviation of 3.6% to 6.3%, recovery was 96.0% ~ 102.3%. 15 test samples for testing, chromium content in the 0.126 ~ 0.289 mg / kg range, significantly lower than the limit required Eco-textiles standards.

Key words: cashmere , chrome , dyeing , dye