Conductometric Determination of Ammonium in Turbid Water with a Flow-batch Porous Membrane-based Diffusion Scrubber System
Chattarika Sukpattanacharoen, Wasin Somboot, Jaroon Jakmunee and Tinakorn Kanyanee* Author for corresponding; e-mail address: tinakorn.kanyanee@cmu.ac.th, tkanyanee@gmail.com
Volume: Vol.49 No.6 (November 2022)
Research Article
DOI: https://doi.org/10.12982/CMJS.2022.107
Received: 18 June 2022, Revised: 16 October 2022, Accepted: 25 October 2022, Published: -
Citation: Sukpattanacharoen C., Somboot W., Jakmunee J. and Kanyanee T., Conductometric Determination of Ammonium in Turbid Water with a Flow-batch Porous Membrane-based Diffusion Scrubber System, Chiang Mai Journal of Science, 2022; 49(6): 1594-1603. DOI 10.12982/CMJS.2022.107.
Abstract
A porous membrane-based diffusion scrubber was fabricated to couple with a conductometric detector as a flow-batch system for determining ammonium in turbid surface waters. A gravity flow of DI water as a gas absorbing liquid and a manual sample introduction was employed to develop a cost- effective device without using a conventional pump and an injection valve. The standard calibration graph was linear in the range of 5 – 100 μmol L-1, with a relative standard deviation of < 5%. The detection limit based on the lowest concentration in the calibration graph of 5 μmol L-1 can be obtained. The results of ammonium determination using the proposed method agree well with those using the batch-wise indophenol blue as a standard method. The proposed analytical system provides a cost-effective setup and easy operation for ammonium determination in some turbid surface waters samples without requiring a fi ltering process and conventional glassware.