摘要
采用同位素稀释电感耦合等离子体质谱法(ID-ICP-MS)测定了聚丙烯塑料中Hg元素的含量。样品处理采用高压密封焖罐酸溶样技术,将样品与202Hg稀释剂混合,通过所加稀释剂的量和测量混合样品中200Hg/202Hg的丰度比,准确计算出样品中Hg元素的含量,同时对测量结果的不确定度进行分析和评定。该方法与传统方法相比具有准确度高、不确定度小、受外界污染及样品损失影响小等优点,适用于国家计量单位对标准物质进行定值。
The content of Hg in polypropylene sample was determined by isotope dilution ICP-MS. The sample was digested by high-pressure vessel with HNO3/H2O2 as the solvent. By measuring 200Hg/202Hg abundance ratio and adding quantity of the spike, the content of Hg was determined. Moreover, the uncertainty of results were also analyzed and evaluated. The method indicates good accuracy, small uncertainty and less Hg loss during the pretreatment process. It is suitable for the certification of reference materials in national metrology institute.
出处
《质谱学报》
EI
CAS
CSCD
2008年第1期6-9,共4页
Journal of Chinese Mass Spectrometry Society
