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

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.

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資料種別: 学術論文

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 作成者:
Naumann, Renate1, 著者           
Alexander-Weber, C., 著者
Eberhardt, R., 著者
Giera, J., 著者
Spitzer, P., 著者
所属:
1MPI for Polymer Research, Max Planck Society, ou_1309545              

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キーワード: metrology; pH; measurement traceability; measurement uncertainty
 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.

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言語: eng - English
 日付: 2002-11
 出版の状態: 出版
 ページ: -
 出版情報: -
 目次: -
 査読: 査読なし
 識別子(DOI, ISBNなど): eDoc: 28435
ISI: 000179795500004
 学位: -

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出版物 1

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出版物名: Analytical and Bioanalytical Chemistry
  出版物の別名 : Anal. Bioanal. Chem.
種別: 学術雑誌
 著者・編者:
所属:
出版社, 出版地: -
ページ: - 巻号: 374 (5) 通巻号: - 開始・終了ページ: 778 - 786 識別子(ISBN, ISSN, DOIなど): ISSN: 1618-2642