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Preparation and Optimization of Optical pH Sensor Based on Sol-Gel

Making use of the sol-gel technique, an optical pH sensor was prepared, which was made from an organic carrier with four indictors including congo red, bromophenol blue, cresol red, and chlorophenol red, cross-linked by tetraethyl orthosilicate (TEOS) and cellulose acetate. The actual detection rang...

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Autores principales: Zhang, Jianxin, Zhou, Lei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6210182/
https://www.ncbi.nlm.nih.gov/pubmed/30248925
http://dx.doi.org/10.3390/s18103195
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author Zhang, Jianxin
Zhou, Lei
author_facet Zhang, Jianxin
Zhou, Lei
author_sort Zhang, Jianxin
collection PubMed
description Making use of the sol-gel technique, an optical pH sensor was prepared, which was made from an organic carrier with four indictors including congo red, bromophenol blue, cresol red, and chlorophenol red, cross-linked by tetraethyl orthosilicate (TEOS) and cellulose acetate. The actual detection range of the optical pH sensor is 2.5–11.0. The optimal ratio of ethyl orthosilicate, absolute ethanol, deionized water, and hydrochloric acid in glue precursor of the sensor-sensitive membrane was explored. The orthogonal experiment was designed to optimize the dosage of cellulose acetate, N,N-dimethylformamide (DMF), indicator, hydrochloric acid, and precursor glue in preparing the sensor-sensitive membrane. The linearity, measurement accuracy, repeatability, stability, and response time of the prepared pH sensor were tested. The measurement results were analyzed using a support vector machine and linear regression. The experimental results show that the optical pH sensor has a measurement accuracy of up to 0.2 pH and better stability and repeatability than the traditional pH glass electrode.
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spelling pubmed-62101822018-11-02 Preparation and Optimization of Optical pH Sensor Based on Sol-Gel Zhang, Jianxin Zhou, Lei Sensors (Basel) Article Making use of the sol-gel technique, an optical pH sensor was prepared, which was made from an organic carrier with four indictors including congo red, bromophenol blue, cresol red, and chlorophenol red, cross-linked by tetraethyl orthosilicate (TEOS) and cellulose acetate. The actual detection range of the optical pH sensor is 2.5–11.0. The optimal ratio of ethyl orthosilicate, absolute ethanol, deionized water, and hydrochloric acid in glue precursor of the sensor-sensitive membrane was explored. The orthogonal experiment was designed to optimize the dosage of cellulose acetate, N,N-dimethylformamide (DMF), indicator, hydrochloric acid, and precursor glue in preparing the sensor-sensitive membrane. The linearity, measurement accuracy, repeatability, stability, and response time of the prepared pH sensor were tested. The measurement results were analyzed using a support vector machine and linear regression. The experimental results show that the optical pH sensor has a measurement accuracy of up to 0.2 pH and better stability and repeatability than the traditional pH glass electrode. MDPI 2018-09-21 /pmc/articles/PMC6210182/ /pubmed/30248925 http://dx.doi.org/10.3390/s18103195 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Jianxin
Zhou, Lei
Preparation and Optimization of Optical pH Sensor Based on Sol-Gel
title Preparation and Optimization of Optical pH Sensor Based on Sol-Gel
title_full Preparation and Optimization of Optical pH Sensor Based on Sol-Gel
title_fullStr Preparation and Optimization of Optical pH Sensor Based on Sol-Gel
title_full_unstemmed Preparation and Optimization of Optical pH Sensor Based on Sol-Gel
title_short Preparation and Optimization of Optical pH Sensor Based on Sol-Gel
title_sort preparation and optimization of optical ph sensor based on sol-gel
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6210182/
https://www.ncbi.nlm.nih.gov/pubmed/30248925
http://dx.doi.org/10.3390/s18103195
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