Molecularly imprinted cryogel beads for cholesterol removal from milk samples

Area of Science:

• Materials Science
• Separation Science
• Biochemistry

Background:

• Cholesterol removal from milk is crucial for health-conscious consumers and specialized food products.
• Existing methods for cholesterol reduction in milk can be inefficient or costly.
• Development of selective and cost-effective adsorbents is needed for dairy processing.

Purpose of the Study:

• To develop and characterize a novel cholesterol-selective adsorbent material for efficient cholesterol removal from milk.
• To investigate the adsorption capacity, selectivity, and reusability of the developed adsorbent.
• To optimize the adsorption process for practical dairy applications.

Main Methods:

• Synthesis of poly(2-hydroxyethyl methacrylate-N-methacryloyl-l-tryptophan methylester) cryogel beads using molecular imprinting.
• Characterization using FTIR, SEM, elemental analysis, and surface area measurements.
• Evaluation of cholesterol adsorption, selectivity against analogues, and reusability through adsorption-desorption cycles.

Main Results:

• Cholesterol-imprinted cryogel beads (CHO-MIPs) exhibited high surface area and stability.
• CHO-MIPs demonstrated significant selectivity for cholesterol over estradiol and progesterone (4.77 and 2.76 fold, respectively).
• Adsorption capacity reached 288.72 mg/g, with minimal capacity loss (9.21%) after eight cycles.

Conclusions:

• The developed CHO-MIP cryogel beads are effective and selective adsorbents for cholesterol removal from milk.
• The material shows excellent reusability and stability, suitable for industrial dairy applications.
• This technology offers a promising solution for producing low-cholesterol dairy products.