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dc.contributor.author전형필-
dc.date.accessioned2018-12-20T07:38:43Z-
dc.date.available2018-12-20T07:38:43Z-
dc.date.issued2018-03-
dc.identifier.citationSENSORS AND ACTUATORS B-CHEMICAL, v. 256, Page. 167-175en_US
dc.identifier.issn0925-4005-
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S092540051731969X-
dc.identifier.urihttp://repository.hanyang.ac.kr/handle/20.500.11754/80980-
dc.description.abstractContinuous monitoring and rapid on-site determination of toxic ammonia in various aqueous systems are important for maintaining water quality and preserving the environment. Though several methods such as flow-based spectrophotometry are currently utilized for this purpose, there is still need for more selective ammonia determination. We present a new detection route for quantifying NH3 in water samples by means of the evaporation of dissolved ammonia into headspace, followed by selective detection using a colorimetric sensor. Gaseous NH3 detection is attained by the selective formation of blue indophenol dye through modified Berthelot's reaction on porous paper. To optimize the sensing layer in terms of uniform and intense coloration, the water-soluble powder reagents were homogeneously dispersed in nonpolar cyclohexane and then deposited by a vacuum-assisted filtration on the paper substrate. The formation of indophenol blue was activated under highly humidified conditions through selective chemical reactions between solid-state Berthelot's reagents and NH3. The colorimetric response of the low-cost paper sensors was saturated within 10 min, and color change was observed by the naked eye for an ammonia solution of 10 mg/L. Furthermore, the response magnitude was not affected by addition of 0.1 wt% polar organic solvents (ethanol, acetone, dimethylformamide or acetic acid) or inorganic salts (NaCl, KCl, MgSO4 or CaSO4), suggesting a good detection cross-selectivity. (C) 2017 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipThis subject is supported by Korea Ministry of Environment (MOE) as "the Chemical Accident Prevention Technology Development Project".en_US
dc.language.isoen_USen_US
dc.publisherELSEVIER SCIENCE SAen_US
dc.subjectDissolved ammonia sensoren_US
dc.subjectColorimetric sensoren_US
dc.subjectBerthelot's methoden_US
dc.subjectPaper-based sensoren_US
dc.titleSelective colorimetric detection of dissolved ammonia in water via modified Berthelot's reaction on porous paperen_US
dc.typeArticleen_US
dc.relation.volume256-
dc.identifier.doi10.1016/j.snb.2017.10.069-
dc.relation.page167-175-
dc.relation.journalSENSORS AND ACTUATORS B-CHEMICAL-
dc.contributor.googleauthorCho, Yeong Beom-
dc.contributor.googleauthorJeong, Seung Hwa-
dc.contributor.googleauthorChun, Hyungphil-
dc.contributor.googleauthorKim, Yong Shin-
dc.relation.code2018001066-
dc.sector.campusE-
dc.sector.daehakCOLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E]-
dc.sector.departmentDEPARTMENT OF CHEMICAL AND MOLECULAR ENGINEERING-
dc.identifier.pidhchun-


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