【摘要】 目的:建立富集分离纺织品提取液中痕量铅的方法,克服高浓度基体对铅浓度测定的影响。方法:用依据GB/T 3922配制的模拟酸性汗液提取纺织品中的痕量铅,应用所建立的共沉淀方法对提取液中的痕量铅进行富集分离,用ICP-AES分别测定富集分离前后的铅浓度及基体浓度。结果:在优化条件下,新建方法富集分离后的铅回收率在95%以上,对Na离子的去除率达到97%以上;实际纺织品中铅的加标回收率为97.42%～104.82%,RSD为2.7%。结论:所建方法操作简便、成本低、引入污染少,能有效分离纺织品提取液中的钠离子,降低基体浓度,5倍富集提取液中铅离子,成功应用于纺织品中痕量铅的检测。更多还原

【Abstract】 Objective The enrichment and separation method was established to enrich trace lead from textile extraction solution in order to overcome the influence of matrix effect on the determination of lead concentration.Methods The Textile sample was treated by simulated sweat prepared according to GB/T3922 to extract trace lead into the solution and the lead was enriched and separated by the established co-precipitation method;the lead and matrix concentrations were determined by ICP-AES before and after enrichment and separation.Results Under the optimized conditions,the recovery rate of lead is more than 95% through this new method while the impurity ions’ removal rate of Na+ is more than 97%;the lead recoveries of standard addition method were 97.42%—104.82%,and the relative standard deviation was 2.7%.Conclusion The characteristic of this method is fast,simple and convenient;the sodium ion was effectively separated from the textile extraction solution in order to reduce the matrix concentration,and the lead ion was enriched by five times in the extraction solution,and the method was successfully used in the determination of trace lead in textiles.更多还原