Evaluation of Laboratories Performance by Interlaboratory Comparisons: Reference Laboratory of Tehran Province Water and Wastewater Company

Articles in Press

Authors

1 Director of Water and Wastewater Quality Monitoring Center of Tehran Province Water and Wastewater Company

2 Head of calibration and LIMS department of reference laboratory of water and Wastewater company of Tehran province

3 Reference Laboratory of Tehran Province Water and Wastewater Company

4 Quality Control Expert of Reference Laboratory of Water and Wastewater Company of Tehran Province

Abstract

Introduction: reference laboratory of Tehran water and wastewater company, with the aim of reducing the costs of water and wastewater laboratories, conducted the first interlaboratory comparison test in 1399 and the second interlaboratory comparison in1400.
Materials and methods: The test was conducted according to the ISO/IEC17043 standard and the OP105 instruction, and data analysis were performed according to the ISO13528 standard and the test methods were based on the Standard Methods of Water and Wastewater.
Results and discussion: In this research, from the results sent by 68 participants, analysis and evaluation of the laboratories' performance was done. The results of the uniformity test showed that all the physicochemical samples of water had good uniformity. According to the results, all parameters except pH were stable. The results showed that among the physicochemical parameters, the highest unfavorable performance of the participants is related to the chloride test and the lowest unfavorable performance is related to the sodium test. Overall, the performance of the participants is satisfactory.
Conclusion: The implementation of two courses of interlaboratory comparisons showed that specialized laboratories have the ability to implement this program and analyze the results. Also, holding this test was very effective in reducing laboratory costs.

Keywords

Journal of Water and Wastewater Science and Engineering

Articles in Press, Accepted Manuscript
Available Online from 09 October 2023

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History

  • Receive Date: 10 May 2023
  • Revise Date: 02 October 2023
  • Accept Date: 09 October 2023

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