Traceability of pH measurements by glass electrode cells: performance 
characteristic of pH electrodes by multi-point calibration

Naumann, Renate; Alexander-Weber, C.; Eberhardt, R.; Giera, J.; Spitzer, P.

doi:10.1007/s00216-002-1506-5

アイテム詳細

登録内容を編集ファイル形式で保存

一時保存へ追加

タグ情報を表示リリース履歴を表示詳細要約

公開

学術論文

Traceability of pH measurements by glass electrode cells: performance characteristic of pH electrodes by multi-point calibration

MPS-Authors

/persons/resource/persons48487

Naumann, Renate
MPI for Polymer Research, Max Planck Society;

External Resource

There are no locators available

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

フルテキスト (公開)

公開されているフルテキストはありません

付随資料 (公開)

There is no public supplementary material available

引用

Naumann, R., Alexander-Weber, C., Eberhardt, R., Giera, J., & Spitzer, P. (2002). Traceability of pH measurements by glass electrode cells: performance characteristic of pH electrodes by multi-point calibration. Analytical and Bioanalytical Chemistry, 374(5), 778-786. doi:10.1007/s00216-002-1506-5.

引用: https://hdl.handle.net/11858/00-001M-0000-000F-64C2-1

要旨

Routine pH measurements are carried out with pH meter-glass electrode assemblies. In most cases the glass and reference electrodes are thereby fashioned into a single probe, the so- called 'combination electrode' or simply 'the pH electrode'. The use of these electrodes is subject to various effects, described below, producing uncertainties of unknown magnitude. Therefore, the measurement of pH of a sample requires a suitable calibration by certified standard buffer solutions (CRMs) traceable to primary pH standards. The procedures in use are based on calibrations at one point, at two points bracketing the sample pH and at a series of points, the so- called multi-point calibration. The multi-point calibration (MPC) is recommended if minimum uncertainty and maximum consistency are required over a wide range of unknown pH values. Details of uncertainty computations for the two-point and MPC procedure are given. Furthermore, the multi-point calibration is a useful tool to characterise the performance of pH electrodes. This is demonstrated with different commercial pH electrodes. Electronic supplementary material is available if you access this article at http://dx.doi.org/10.1007/s00216- 002-1506-5. On that page (frame on the left side), a link takes you directly to the supplementary material.