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| 美国NIST元素汞发生器的基准溯源传递方法 |
| he Method of Prime Traceability and Delivery on Element Mercury Generator from the NIST in USA |
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| DOI： |
| 中文关键词: NIST 元素汞发生器 溯源 同位素稀释电感耦合等离子体/质谱法 |
| 英文关键词: NIST Element mercury generator Traceability Isotope dilution inductively coupled plasma mass spectrometry(ID ICP/MS) |
| 基金项目:环保公益性行业科研专项基金资助项目（201209050）；国家重大科学仪器设备开发专项基金资助项目（2011YQ060100） |
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| 中文摘要: |
| 综述了美国NIST元素汞发生器的基准溯源传递方法，通过在输出的汞标准气体中混合加入已知高纯度的201Hg0气体（201Hg2+标准溶液还原雾化），并采用同位素稀释电感耦合等离子体/质谱法（ID ICP/MS）测量加标后201Hg/202Hg同位素丰度比例，计算出待溯源元素汞发生器输出的Hg0质量浓度。该过程实现了从元素汞一级标准物质SRM 3133到201Hg2+标准溶液，再到元素汞发生器输出标准气体的溯源传递，完成了从NIST元素汞基准到仪器供应商生产基准的一级溯源传递，为建立符合我国需求的元素汞溯源传递方法和形成元素汞发生器溯源传递能力提供借鉴。 |
| 英文摘要: |
| Overviewing the method of prime traceability and delivery on element mercury generator from the NIST in USA.USA NIST uses ID ICP/MS method to calculate the candidate mercury generator output concentration,it adds known high pure201Hg0 gas to candidate element mercury generator output calibration gas,then abundance of the spiked isotope 201Hg will be changed,the abundance ratio of 201Hg/202Hg will be measured by ICP/MS. This process completes mercury traceability which is from the prime SRM 3133 to 201Hg2+solution concentration,and from 201Hg2+ solution concentration to element mercury generator. This method is for the vender prime to trace to NIST prime,it is good for us to establish the element mercury generator traceability method and capacity which is suitable for Chinese requirement. |
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