纳米Fe_3O_4富集、ICP-OES法测定纺织品中可萃取砷

Determination of Trace Arsenic in Textiles by ICP-OES Method with Nano-Fe_3O_4 Concentrate and Separation

本文建立了用纳米材料富集／电感耦合等离子体发射光谱（ICP—OES）仪测定纺织品萃取液中痕量砷的方法。依据GB／T3922配制的模拟酸性汗液萃取纺织品中的痕量砷，应用纳米Fe3O4对萃取液中的痕量砷进行富集浓缩，基体匹配后用ICP—OES法测定纺织品中痕量砷元素。在优化条件下，即在室温，pH值5．5，用50mg纳米Fe3O4定量富集纺织品中痕量砷，震荡240min后，静置离心，弃去上层清液，下层纳米Fe3O4用盐酸溶解，基体匹配后用ICP—OES仪测定。本法回收率在91％以上，实际纺织品的加标回收率在91．98％～102．08％之间，平均回收率96．38％。

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 rising simulation acidic sweat prepared based on GB/T 3922 and concentrated from the extract by nano- Fe3O4, at last it was determined by 1CP-OES method alter the matrix matching. The optimal conditions arc at room temperature, pH value 5.5, quantitatively concentrating the trace arsenic in textiles with 50 mg nano-Fe3O4, shocking for 240min, 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%.