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Application of the Sum of Individual Estimates (SIE) Corrections to the Freezing Temperature of Zinc and Verification of the Chemical Assay Results Based on a Physical Thermometry Technique

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Abstract

The freezing temperatures of two different, high-purity (nominal purity of 99.9999 %) zinc samples were realized, and the dissolved impurities were analyzed at three independent Glow Discharge Mass Spectrometry (GD-MS) laboratories to correct the impurity effects using the sum of individual estimates (SIE) method. Comparisons were made between the difference in the realized freezing temperatures and the three differences in the SIE corrections based on the individual assay results. Among them, the impurity compositions analyzed at one laboratory resulted in the difference in the SIE corrections matching the measured temperature difference; that is, the SIE-corrected zinc freezing temperatures based on only one assay laboratory coincided with the measurement result. Therefore, the best approximation to the freezing temperature of ideally pure zinc was attained with the aid of the consistent assay result, and the physical measurement of the difference in the realized freezing temperatures could be used as a practical method verifying the consistency and the reliability of the chemical assay results.

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Data Availability

All the raw data are available (if requested).

Abbreviations

c :

Concentration

k :

Coverage factor

m :

Liquidus slope

R :

Resistance

t :

Temperature

u :

Standard uncertainty

U :

Expanded uncertainty

W :

Resistance ratio (RFT/RTPW)

0:

Concentration at the liquidus point

i :

Specific impurity

FT:

Freezing temperature

TPW:

Triple point of water

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Acknowledgements

This work was supported by a Research Grant of Pukyong National University (2019, C-D-2019-1355).

Funding

This work was supported by a Research Grant of Pukyong National University (2019, C-D-2019-1355).

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Authors and Affiliations

  1. Department of Mechanical Engineering, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan, 48513, Republic of Korea

    Wukchul Joung

  2. Department of Smart Robot Convergence and Application Engineering, Pukyong National University, Busan, Republic of Korea

    Wukchul Joung

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Correspondence to Wukchul Joung.

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Joung, W. Application of the Sum of Individual Estimates (SIE) Corrections to the Freezing Temperature of Zinc and Verification of the Chemical Assay Results Based on a Physical Thermometry Technique. Int J Thermophys 42, 133 (2021). https://doi.org/10.1007/s10765-021-02888-9

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