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Determination of chitosan content with Schiff base method and HPLC
Qin Miao1, Yingqi Mi1, Jingmin Cui1
1Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, Shandong, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Accurate chitosan content determination is crucial for quality control. A new method synthesizes chitosan-Schiff base derivatives, hydrolyzes them to glucosamine hydrochloride, and quantifies it via HPLC for precise chitosan measurement.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Polymer Science
Background:
- Accurate determination of chitosan content is vital for its quality control in various applications.
- Existing methods may have limitations in precision or convenience.
- Chitosan's properties are highly dependent on its degree of deacetylation and purity.
Purpose of the Study:
- To develop a novel, accurate, and convenient method for determining chitosan content.
- To establish a reliable analytical approach for chitosan quality assessment.
- To provide an alternative quantitative method for Schiff base derivatives of chitosan.
Main Methods:
- Synthesis of two chitosan-Schiff base derivatives (BCSB and PCSB) using varying degrees of deacetylation.
- Hydrolysis of Schiff base derivatives in a strong hydrochloric acidic environment to yield glucosamine hydrochloride (GAH).
- Quantification of GAH concentration using High-Performance Liquid Chromatography (HPLC).
Main Results:
- The method allows for the calculation of GAH mass from the hydrolysis solution.
- Theoretical chitosan mass is deduced through converse calculation based on GAH yield.
- The final chitosan content is determined by comparing the initial sample mass with the calculated theoretical mass.
Conclusions:
- The developed method provides an accurate and convenient approach for determining chitosan content.
- This technique offers a preeminent solution for the quality control of chitosan.
- The study highlights the utility of Schiff base derivatives in quantitative chitosan analysis.
