Determination of chloride in admixtures and aggregates for concrete by flow injection potentiometry

Authors

  • Jaroon Junsomboon Department of Science Service
  • Jaroon Jakmunee Department of Chemistry, Faculty of Science, Chiang Mai University

DOI:

https://doi.org/10.60136/bas.v4.2015.289

Keywords:

Flow injection, Potentiometry, Chloride, Concrete, Hydrodynamic injection

Abstract

A simple flow injection system using three 3-way solenoid valves as an electric control injection valve and with a simple home-made chloride ISE based on Ag/AgCl wire as a sensor for determination of chloride in admixtures and aggregates for cement has been developed. A liquid sample or an extract was injected into a water carrier stream which was then merged with 0.1 M KNO3 stream and flowed through a flow cell where the solution will be in contact with the sensor, producing a potential change recorded as a peak. A linear calibration graph in range of 10 - 100 mg [ was obtained with a detection limit of 2 mg L-1. Relative standard deviation for 7 replicates injecting of 20, 60 and 90 mg L-1 chloride solution was 1.0,1.2 and 0.6 % respectively. Sample throughput of 60 h-1 was achieved with the consumption of 1 mL each of electrolyte solution and water carrier. The developed method was validated by the British Standard methods.

References

British Standard: Testing aggregates, Part 117: Method for determination of water soluble chloride salts (BS 812: Part 117:1988, Method A), British Standard Institution, 1988.

British Standard : Admixtures for concrete, mortar and grout - Test Methods - Part 10: Determination of water soluble chloride content (BS EN 480–10: 1997), British Standard Institution, 1997.

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แสดงพีคของสารละลายมาตรฐานคลอไรด์เข้มข้น10-100 มิลลิกรัมต่อ ลิตร ที่ได้จากการวิเคราะห์คลอไรด์ด้วยเทคนิคโฟลอินเจคชันโพเทนชิออเมตริก

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Published

01-08-2015

How to Cite

Junsomboon, J., & Jakmunee, J. (2015). Determination of chloride in admixtures and aggregates for concrete by flow injection potentiometry. Bulletin of Applied Sciences, 4(4), 19–27. https://doi.org/10.60136/bas.v4.2015.289

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Section

Research article