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Your search keyword '"Liang, Rongning"' showing total 150 results
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150 results on '"Liang, Rongning"'

8. Polymeric membrane ion-selective electrode based on potential-modulated ion transfer: ultrasensitive measurement of oceanic pH.

Author

Liu, Lu, Liu, Yuanxin, Jiang, Tianjia, Liang, Rongning, and Qin, Wei

Subjects
POLYMERIC membranes, SEA water analysis, OCEAN acidification, ELECTRODES, IONS
Abstract

The application of a potentiometric pH electrode in ocean acidification observation is still a challenge due to its poor sensitivity to small pH changes. Herein, a simple approach to remarkably improve the detection precision of a polymeric membrane ion-selective electrode is proposed based on the potential-modulated ion transfer mechanism. The present sensing strategy displays highly sensitive responses to small pH changes for seawater analysis with a precision of 5 μpH, which is 2 orders of magnitude lower than that of the conventional pH electrode. [ABSTRACT FROM AUTHOR]

Published
2024
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16. Polymeric membrane potentiometric sensors based on template-removal-free imprinted receptors for determination of antibioticsElectronic supplementary information (ESI) available. See DOI: https://doi.org/10.1039/d4ay00263f

Author

Wang, Xinyao, Cui, Guohua, Liang, Rongning, and Qin, Wei

Abstract

Currently, Nernstian-response-based polymeric membrane potentiometric sensors using molecularly imprinted polymers (MIPs) as receptors have been successfully developed for determination of organic ionic species. However, the preparation of these MIP receptors usually involves tedious and time-consuming template-removal procedures. Herein, a template-removal-free MIP is proposed and used as a receptor for fabrication of a potentiometric sensor. The proposed methodology not only significantly shortens the preparation time of MIP-based potentiometric sensors but also improves the batch-to-batch reproducibility of these sensors. By using antibiotic vancomycin as a model, the new concept offers a linear concentration range of 1.0 × 10−7to 1.0 × 10−4mol L−1with a detection limit of 2.51 × 10−8mol L−1. It can be expected that the template-removal-free MIP-based sensing strategy could lay the foundation for simple fabrication of electrochemical sensors without the need for template removal such as potentiometric and capacitive sensors and ion-sensitive field-effect transistors.

Published
2024
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33. Molecularly imprinted polymer-based potentiometric sensors

Author

Junhao Wang, Liang Rongning, and Wei Qin

Subjects
Materials science, Biological species, 010401 analytical chemistry, Potentiometric titration, Molecularly imprinted polymer, Nanotechnology, Polymeric membrane, 01 natural sciences, Spectroscopy, 0104 chemical sciences, Analytical Chemistry, Organic molecules
Abstract

Carrier-based polymeric membrane potentiometric sensors have been widely used for determination of inorganic ions in clinical and environmental applications. In view of the need for a wider application scope of these sensors, the list of targets needs to be increased. Molecularly imprinted polymer (MIP)-based potentiometric sensors are ideal candidates for sensing of organic and biological species. The development of such sensors may open attractive horizons for potentiometric sensing and further expand the field. The past few decades have witnessed remarkable achievements in these sensors. This review summarizes recent advances in the MIP synthesis, the detection modes of these sensors and their applications for organic and biological species in environmental and biological analyses, and attempts to illustrate the research directions. We hope that this review will shed new light on the understanding of MIP-based potentiometric sensors and pave the way for the widespread applications of polymeric membrane potentiometric sensors.

Published
2020

45. Soluble Molecularly Imprinted Polymer-Based Potentiometric Sensor for Determination of Bisphenol AF

Author

Zhang, Huan, Yao, Ruiqing, Wang, Ning, Liang, Rongning, and Qin, Wei

Abstract

Molecularly imprinted polymer (MIP)-based polymeric membrane potentiometric sensors have been successfully developed for determination of organic compounds in their ionic and neutral forms. However, most of the MIP receptors in potentiometric sensors developed so far are insoluble and cannot be well dissolved in the polymeric membranes. The heterogeneous molecular recognitions between the analytes and MIPs in the membranes are inefficient due to the less available binding sites of the MIPs. Herein we describe a novel polymeric membrane potentiometric sensor using a soluble MIP (s-MIP) as a receptor. The s-MIP is synthesized by the swelling of the traditional MIP at a high temperature. The obtained MIP can be dissolved in the plasticized polymeric membrane for homogeneous binding of the imprinted polymer to the target molecules. By using neutral bisphenol AF as a model, the proposed method exhibits an improved sensitivity compared to the conventional MIP-based sensor with a lower detection limit of 60 nM. Moreover, the present sensor exhibits an excellent selectivity over other phenols. We believe that s-MIPs can provide an appealing substitute for the traditional insoluble MIP receptors in the development of polymeric membrane-based electrochemical and optical sensors.

Published
2024
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