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Proceedings Paper

Determination of water pH using absorption-based optical sensors: evaluation of different calculation methods
Author(s): Hongliang Wang; Baohua Liu; Zhongjun Ding; Xiangxin Wang
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Paper Abstract

Absorption-based optical sensors have been developed for the determination of water pH. In this paper, based on the preparation of a transparent sol–gel thin film with a phenol red (PR) indicator, several calculation methods, including simple linear regression analysis, quadratic regression analysis and dual-wavelength absorbance ratio analysis, were used to calculate water pH. Results of MSSRR show that dual-wavelength absorbance ratio analysis can improve the calculation accuracy of water pH in long-term measurement.

Paper Details

Date Published: 10 February 2017
PDF: 4 pages
Proc. SPIE 10250, International Conference on Optical and Photonics Engineering (icOPEN 2016), 102502D (10 February 2017); doi: 10.1117/12.2266904
Show Author Affiliations
Hongliang Wang, National Deep Sea Ctr. (China)
Baohua Liu, National Deep Sea Ctr. (China)
Zhongjun Ding, National Deep Sea Ctr. (China)
Xiangxin Wang, National Deep Sea Ctr. (China)

Published in SPIE Proceedings Vol. 10250:
International Conference on Optical and Photonics Engineering (icOPEN 2016)
Anand Krishna Asundi; Xiyan Huang; Yi Xie, Editor(s)

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