Distance and Color Change Based Hydrogel Sensor for Visual Quantitative Determination of Buffer Concentrations

Wang, Renjie; Du, Xinfeng; Zhai, Jingying; Xie, Xiaojiang

2019-04

10.1021/acssensors.9b00186

ACS Sensors   影响因子和分区

2379-3694

We present here an innovative platform for the determination of pH buffer capacity based on FITC-dextran loaded hydrogels. Optical signals from the pH-sensitive hydrogels were analyzed by simple parameters including distance and color change. The methodology was validated on five different buffer systems and exhibited wide linearity (0.1 to 100 mM), good batch-to-batch reproducibility, high versatility, and resistance to background ionic strength changes. Experimental results also fit well with a theoretical model based on numerical simulation. Preliminary application in carbonate alkalinity determination of seawater proved very successful. This hydrogel buffer concentration sensor is fundamentally different from conventional acid-base titrations, brings minimum perturbation to samples, and shows great potential in real applications.

buffer capacity distance-based visual detection alkalinity acidity hydrogel agarose fluorescence

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[]

Chemistry ; Science & Technology - Other Topics

Chemistry, Multidisciplinary ; Chemistry, Analytical ; Nanoscience & Nanotechnology

WOS:000466442500030

AMER CHEMICAL SOC

20191806857359

Acidity ; Alkalinity ; Buffer storage ; Colorimetry ; Fluorescence ; Ionic strength ; pH ; Titration

Data Storage, Equipment and Techniques:722.1 ; Light/Optics:741.1 ; Chemistry:801 ; Chemical Products Generally:804 ; Optical Variables Measurements:941.4

Web of Science

Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China

Wang, Renjie,Du, Xinfeng,Zhai, Jingying,et al. Distance and Color Change Based Hydrogel Sensor for Visual Quantitative Determination of Buffer Concentrations[J]. ACS Sensors,2019,4(4):1017-1022.

Wang, Renjie,Du, Xinfeng,Zhai, Jingying,&Xie, Xiaojiang.(2019).Distance and Color Change Based Hydrogel Sensor for Visual Quantitative Determination of Buffer Concentrations.ACS Sensors,4(4),1017-1022.

Wang, Renjie,et al."Distance and Color Change Based Hydrogel Sensor for Visual Quantitative Determination of Buffer Concentrations".ACS Sensors 4.4(2019):1017-1022.