A new traceability scheme for the development of international system-traceable persistent organic pollutant reference materials by quantitative nuclear magnetic resonance
A new traceability scheme for the development of international system-traceable persistent organic pollutant reference materials by quantitative nuclear magnetic resonance
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DOI：
10.1007/s00769-008-0461-z
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发表时间：
2009-02-01
影响因子：
0.9
通讯作者：
Hirai, Tetsuya
中科院分区：
文献类型：
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作者：
Saito, Takeshi;Ihara, Toshihide;Hirai, Tetsuya
采用定量核磁共振（qNMR）技术对持久性有机污染物（POP）纯化合物的纯度进行了测定。qNMR是一种独特的定量方法，不仅可追溯到国际单位制（SI），而且不需要自己的标准。在这项工作中确定的持久性有机污染物化合物的纯度可追溯到一个单一的认证标准物质（CRM），这是非常有吸引力的标准物质生产商。通过qNMR观察到的纯度与通过气相色谱-火焰离子化检测（GC/FID）或差示扫描量热法（DSC）-热重分析仪（TGA）观察到的纯度相当。通过qNMR方法获得的不确定度与通过DSC观察到的不确定度相比略大。
Quantitative nuclear magnetic resonance (qNMR) was used for the purity determination of neat compounds of persistent organic pollutants (POPs). qNMR is a unique quantitative method that is not only traceable to the International System of Units (SI), but it also does not require a standard of its own. The purities of the POP compounds determined in this work were traceable to a single certified reference material (CRM), which is extremely attractive for reference material producers. The purities observed by qNMR were equivalent to those observed by gas chromatography with flame ionization detection (GC/FID) or a differential scanning calorimetry (DSC) combined with a thermogravimetric analyzer (TGA). The uncertainties obtained by the qNMR method were comparable to being slightly larger than those observed by DSC.