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Year 2022, , 56 - 68, 27.03.2022
https://doi.org/10.18185/erzifbed.946469

Abstract

References

  • Asakai, T., Murayama, M., Tanaka, T. (2007). Precise Coulometric Titration of Sodium Thiosulfate and Development of Potassium Iodate as a Redox Standard. Talanta, 73, pp. 346-351.
  • Eurachem and CITAC (2012). Quantifying uncertainty in analytical measurement, https://www.eurachem.org/index.php/publications/guides/quam#translations Accessed 27 August 2020.
  • Eurolab (2007). Measurement uncertainty revisited: Alternative approaches to uncertainty evaluation (Eurolab Technical Report No.1/2007), https://drive.google.com/file/d/1b_bKTxrJ-a9fYfxxfMqlj-CrTNnvOXNZ/view Accessed 22 December 2020.
  • Hulanicki, A., Maj-Zurawska, M., Glab, S. (2013). Titrimetry/Potentiometry. Molecular Sciences and Chemical Engineering, Elsevier.
  • JCGM. (2008). Evaluation of measurement data – Guide to the expression of uncertainty in measurement. JCGM. France.
  • Liv, L. (2021). Measurement uncertainty evaluation for titrimetric determination of benzoic acid purity. Journal of Chemical Metrology, (in press), http://doi.org/10.25135/jcm.54.20.11.1881
  • Ma, L. (2002). Determination of the purity of potassium iodate by constant-current coulometry. Accreditation and Quality Assurance.7 pp. 163-167.
  • Mariassy, M., Pratt, K. W., Spitzer, P. (2009). Major Applications of Electrochemical Techniques at National Metrology Institutes. Metrologia, 46, pp. 199-213, 2009.
  • Shimolin, A. J., Sobina, A. V., Zyskin, V. M. (2017). Potassium Iodate Purity Determination by High Precision Coulometric Titration: New Measurement Procedure Implementation. 2nd International Ural Conference on Measurements (UralCon).
  • Tuthill, S. M., Sprague, R. S., Stoecker, W. C. (1996). Precise Method for Assay of Potassium Iodate by Comparison with (Primary Standard) Arsenic Trioxide. Analytical Chemistry, 36 (10).

Uncertainty Estimation for Determination of Potassium Iodate Purity by Potentiometric Titrimetry

Year 2022, , 56 - 68, 27.03.2022
https://doi.org/10.18185/erzifbed.946469

Abstract

The purpose of this study was to express the uncertainty estimation for the purity determination of potassium iodate by potentiometric titrimetry method. Potassium iodate determination by using a potentiometric titrator was realized in two steps. In the first step, a factor analysis is performed using sodium thiosulfate. In the second step, the amount of potassium iodate was determined by using the factor value obtained in the first step of the measurement. Sigma Aldrich 60386 CRM (certified by BAM-with purity of 99.94%) was used for factor analysis. The documents of “Evaluation of measurement data - Guide to the expression of uncertainty in measurement” and “EA-4/02 M: 2013 Evaluation of the Uncertainty of Measurement in Calibration” were the source for the evaluation of the measurement uncertainty. The documents of “EURACHEM/CITAC Guide CG 4, JCGM 100: 2008” and “Eurolab Technical Report No.1/2007” based on the bottom-up approach were also paid regard during the uncertainty estimation study. The main factors that are forming the total uncertainty budget were repeatability of measurement results, titrant consumption, factor of sodium thiosulfate, the molar mass of potassium iodate and sample quantity. It was observed that the highest contribution to the uncertainty budget was the repeatability of measurement results. The measurement result for the purity determination of potassium iodate was found as 99.76% and the expanded uncertainty of the measurements was estimated as 0.12% which was acceptable level for the study.

References

  • Asakai, T., Murayama, M., Tanaka, T. (2007). Precise Coulometric Titration of Sodium Thiosulfate and Development of Potassium Iodate as a Redox Standard. Talanta, 73, pp. 346-351.
  • Eurachem and CITAC (2012). Quantifying uncertainty in analytical measurement, https://www.eurachem.org/index.php/publications/guides/quam#translations Accessed 27 August 2020.
  • Eurolab (2007). Measurement uncertainty revisited: Alternative approaches to uncertainty evaluation (Eurolab Technical Report No.1/2007), https://drive.google.com/file/d/1b_bKTxrJ-a9fYfxxfMqlj-CrTNnvOXNZ/view Accessed 22 December 2020.
  • Hulanicki, A., Maj-Zurawska, M., Glab, S. (2013). Titrimetry/Potentiometry. Molecular Sciences and Chemical Engineering, Elsevier.
  • JCGM. (2008). Evaluation of measurement data – Guide to the expression of uncertainty in measurement. JCGM. France.
  • Liv, L. (2021). Measurement uncertainty evaluation for titrimetric determination of benzoic acid purity. Journal of Chemical Metrology, (in press), http://doi.org/10.25135/jcm.54.20.11.1881
  • Ma, L. (2002). Determination of the purity of potassium iodate by constant-current coulometry. Accreditation and Quality Assurance.7 pp. 163-167.
  • Mariassy, M., Pratt, K. W., Spitzer, P. (2009). Major Applications of Electrochemical Techniques at National Metrology Institutes. Metrologia, 46, pp. 199-213, 2009.
  • Shimolin, A. J., Sobina, A. V., Zyskin, V. M. (2017). Potassium Iodate Purity Determination by High Precision Coulometric Titration: New Measurement Procedure Implementation. 2nd International Ural Conference on Measurements (UralCon).
  • Tuthill, S. M., Sprague, R. S., Stoecker, W. C. (1996). Precise Method for Assay of Potassium Iodate by Comparison with (Primary Standard) Arsenic Trioxide. Analytical Chemistry, 36 (10).
There are 10 citations in total.

Details

Primary Language English
Subjects Engineering
Journal Section Makaleler
Authors

Emrah Uysal 0000-0001-5783-1874

Lokman Liv 0000-0001-8008-1012

Publication Date March 27, 2022
Published in Issue Year 2022

Cite

APA Uysal, E., & Liv, L. (2022). Uncertainty Estimation for Determination of Potassium Iodate Purity by Potentiometric Titrimetry. Erzincan University Journal of Science and Technology, 15(1), 56-68. https://doi.org/10.18185/erzifbed.946469