Conductometric Determination of Ammonium in Turbid Water with a Flow-batch Porous Membrane-based Diff usion Scrubber System
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Published:2022-11-30
Issue:6
Volume:49
Page:
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ISSN:0125-2526
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Container-title:Chiang Mai Journal of Science
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language:
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Short-container-title:CMJS
Author:
Sukpattanacharoen Chattarika, ,Somboot Wasin,Jakmunee Jaroon,Kanyanee Tinakorn, , , , , , , ,
Abstract
A porous membrane-based diffusion scrubber was fabricated to couple with a conductometric detector as a fl ow-batch system for determining ammonium in turbid surface waters. A gravity fl ow 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.
Publisher
Chiang Mai University
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Materials Science,General Mathematics,General Chemistry