Hydroxyethylcellulose-graft-poly (N,N-dimethylacrylamide) copolymer as a multifunctional separation medium for CE

Area of Science:

• Biochemistry
• Analytical Chemistry
• Materials Science

Background:

• Capillary electrophoresis (CE) requires advanced separation media for complex biological samples.
• Basic protein adsorption to separation surfaces is a significant challenge in CE.
• Simultaneous separation of proteins and DNA fragments demands versatile and robust matrices.

Purpose of the Study:

• To develop and characterize a novel multifunctional separation medium for CE.
• To evaluate the medium's efficacy in separating basic proteins and double-stranded DNA (dsDNA) fragments.
• To assess the medium's ability to prevent non-specific protein adsorption.

Main Methods:

• Synthesis of hydroxyethylcellulose-graft-poly (N,N-dimethylacrylamide) copolymer.
• Application of the copolymer as a noncovalent coating in CE.
• Testing separation efficiency for basic proteins across various pH values.
• Assessing dsDNA fragment separation using the copolymer as a sieving matrix.

Main Results:

• The copolymer coating effectively resisted basic protein adsorption.
• Highly efficient and rapid separation of basic proteins was achieved at four different pH values.
• Baseline separation of 11 dsDNA fragments was accomplished using the copolymer matrix.

Conclusions:

• The synthesized copolymer is a promising multifunctional medium for CE.
• This medium offers a powerful solution for both basic protein and dsDNA analysis.
• The noncovalent coating provides excellent anti-adsorption properties, enhancing separation performance.