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Notice of retraction
Vol. 34, No. 8(3), S&M3042

Notice of retraction
Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
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Sensors and Materials, Volume 30, Number 6(1) (2018)
Copyright(C) MYU K.K.
pp. 1253-1261
S&M1581 Research Paper
https://doi.org/10.18494/SAM.2018.1841
Published: June 14, 2018

Ruthenium Organometallic-bromophenol Blue Pairs in Hydrogel Sensing Matrix for Dissolved Ammonia FRET Sensor [PDF]

Z. Mohd Zain, A. S. Abd Aziz, M. N. Mohd Zain, M.S. Abdullah and S. Z. Rejal

(Received December 19, 2017; Accepted April 11, 2018)

Keywords: dissolved ammonia sensor, hydrogel sensing membrane, optical FRET

Monitoring dissolved ammonia (DA) in tilapia fish farming ponds is important because a DA concentration as low as 100 parts per billion (ppb) depresses tilapia food intake and growth. Hence, a DA sensor capable of sub-ppm-level detection based on the Förster resonance energy transfer (FRET) of a single donor–acceptor pair has been developed to determine DA in tilapia breeding ponds. Certain mole ratio amounts of ruthenium organometallic complex (donor) to bromophenol blue (acceptor) were immobilized in hydrogel, polyvinyl chloride, and polysiloxanes membrane matrices. The hydrogel membrane matrix showed the best performance. A DA sensitivity at the ppb level has been achieved on a membrane of 2–3 µm thickness. The FRET sensing membrane performed reversibly with a response time of 10 min at 100 ppb DA in phosphate buffer (pH 11) with 100% (8 ppm) dissolved oxygen content in the solution. The pH and other amines did not interfere with the selectivity toward DA. Hence, the membrane has been applied to determine the DA concentration in tilapia fish ponds with 80% accuracy as compared with the Nessler method.

Corresponding author: Z. Mohd Zain


Cite this article
Z. Mohd Zain, A. S. Abd Aziz, M. N. Mohd Zain, M.S. Abdullah and S. Z. Rejal , Ruthenium Organometallic-bromophenol Blue Pairs in Hydrogel Sensing Matrix for Dissolved Ammonia FRET Sensor, Sens. Mater., Vol. 30, No. 6, 2018, p. 1253-1261.



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