Precise evaluation of batch adsorption kinetics of plant total polyphenols based on a flow-injection online spectrophotometric method

Efficient evaluation of adsorption kinetics of plant total polyphenols is essential for the design of adsorption separation of bioactive compounds. The conventional method uses manual sampling with poor reproducibility. Here, we developed a new method for on-line determination of total polyphenol co...

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Bibliographic Details
Published in:Analytical methods 2024-01, Vol.16 (4), p.589-598
Main Authors: Guo, Gaowei, Muhammad, Turghun, Aimaiti, Zulihumaer, Dolkun, Almire, Tian, Mei, Zhao, Qian, Reheman, Aikebaier
Format: Article
Language:English
Subjects:
Adsorption
Bioactive compounds
Flow Injection Analysis - methods
Injection
Kinetics
Parameters
Plant extracts
Plants
Polyphenols
Polyphenols - analysis
Reagents
Reproducibility of Results
Spectrophotometry
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Summary:Efficient evaluation of adsorption kinetics of plant total polyphenols is essential for the design of adsorption separation of bioactive compounds. The conventional method uses manual sampling with poor reproducibility. Here, we developed a new method for on-line determination of total polyphenol content (TPC) in plant extracts by applying the Folin-Ciocalteu method in flow-injection analysis (FIA). The FIA parameters were optimized and a standard curve with excellent linearity was established. Precise determination of TPC with a satisfactory sample throughput of 20 h −1 was achieved for the adsorption kinetic study. The pseudo-second-order kinetic model was found to better describe the kinetic parameters of the batch adsorption/desorption process. The developed method proved to be accurate compared with the conventional method. The FIA method holds significant promise for studying and monitoring adsorption processes, due to its automatic on-line nature, low consumption of reagents and samples, and the ability to generate large quantities of highly accurate adsorption data. A new merging-zone FIA method was developed for on-line detection of total polyphenol during the batch adsorption process of plant extract by adsorption resin, and the kinetic curves were precisely constructed to find the most suitable kinetic model.
ISSN:1759-9660
1759-9679
DOI:10.1039/d3ay02023a