PDF(Pubmed)
Abstract：
The recently introduced unified pH ([Formula: see text]) concept enables rigorous pH measurements in non-aqueous and mixed media while at the same time maintaining comparability to the conventional aqueous pH scale. However, its practical application is hindered by a shortage of reference [Formula: see text] values. In order to improve this situation, the European Metrology Research Project (EMPIR) UnipHied (\"Realisation of a UnipHied pH scale\") launched an interlaboratory comparison among highly experienced electrochemistry expert laboratories to assign the first such reference [Formula: see text] values by adopting an extensive statistical treatment of the reported measurement data: to phosphate buffer in water-ethanol mixture (50 wt% of ethanol) and ammonium formate buffer in pure ethanol. Two different measurement setups - one capable of being easily adopted in industrial applications - have been used to demonstrate the robustness of [Formula: see text] measurement. This is an important step towards wider adoption of the [Formula: see text] concept in practice, like liquid chromatography, biofuels analysis and electrocatalysis.
摘要：
最近引入的统一pH([公式:见正文])概念使得能够在非水性和混合介质中进行严格的pH测量,同时保持与常规水性pH标度的可比性。然而,它的实际应用受到参考[公式：见正文]值不足的阻碍。为了改善这种情况，欧洲计量研究项目（EMPIR）UnipHied（“UnipHiedpH标度的实现”）在经验丰富的电化学专家实验室之间进行了实验室间比较，以通过对报告的测量数据进行广泛的统计处理来分配第一个此类参考[公式：见正文]值：水-乙醇混合物中的磷酸盐缓冲液（50wt％的乙醇）和纯乙醇中的甲酸铵缓冲液。两种不同的测量设置-一种易于在工业应用中采用-已用于演示[公式：见正文]测量的鲁棒性。这是在实践中更广泛采用[公式:见正文]概念的重要一步,像液相色谱法，生物燃料分析和电催化。
