Abstract: The article establishes a method to determine trace arsenic extracted from textiles which is concentrated with nanometer material by ICP-OES method. The trace arsenic in textiles was extracted by using simulation acidic sweat prepared based on GB/T 3922 and concentrated from the extract by nano- Fe₃O₄, at last it was determined by ICP-OES method after the matrix matching. The optimal conditions are at room temperature, pH value 5.5, quantitatively concentrating the trace arsenic in textiles with 50 mg nano-Fe₃O₄, shocking for 240 min, standing for centrifugal, discarding the supernatant soluble and then determining the trace arsenic in the extract of textiles by ICP-OES after matrix matching. The recovery of arsenic after concentration and separation by this method is over 91%. Actual textile standard recovery rate is between 91.98% ～ 102.08% and average recovery rate is 96.38%.

Key words: arsenic; inductively coupled plasma optical emission spectrometry (ICP-OES) ; nano-Fe₃O₄;textiles