Determination of boron concentration in aqueous solutions based on conductivity measurement: a boron sensor based on conductivity measurement
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In this work, a simple electrical conductivity measurement technique is applied to effectively determine the boron concentration in the aqueous solution based on the ionized complex formed between boron species and vitamin B6, which can be easily detected and accurately measured using a conductivity meter. The log of boron concentration is linearly correlated with the log of conductivity change within the range of 0–550 mg/L boron content. The correlation coefficient (R2) is up to 0.99882. The reproducibility is 100%. The methods can be directly applicable in deionization water or diluted seawater within diluted factor 34 times or higher (0–1600 us/cm conductivity range). This work provides a cost-effective technology for the boron measurement and will be of great industrial importance in boron measurement field.
KeywordsBoron sensor Vitamin B6 Ionic complex formation Electrical conductivity difference
This project was supported by the National Research Foundation, Prime Minister’s Office, Singapore, under its Environment and Water Research Program (Project Ref. No. 1301-IRIS-17). This program is administered by the Public Utilities Board (PUB), Singapore’s national water agency. F.C. thanks the support from “Outstanding Young Scholar” project. X.H. was supported by the union project of National Natural Science Foundation of China and Guangdong Province (U1601214), the Scientific and Technological Plan of Guangdong Province (2017B090901027, 2016A050503040, 2016B010114002), the Scientific and Technological Plan of Guangzhou City (201607010322, 201607010274), and the Innovation Project of Graduate School of South China Normal University (2016lkxm49).
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