Molecularly imprinted polymer-based chemiluminescence array sensor for the detection of proline

Area of Science:

• Analytical Chemistry
• Polymer Science
• Biochemistry

Background:

• Accurate proline detection is crucial in various scientific fields.
• Existing analytical methods may lack specificity or sensitivity.
• Molecularly imprinted polymers (MIPs) offer tailored molecular recognition capabilities.

Purpose of the Study:

• To develop a novel molecularly imprinted polymer (MIP)-chemiluminescence (CL) method for proline detection.
• To enhance specificity, sensitivity, and response speed in proline analysis.
• To establish a reliable analytical technology for proline determination in real samples.

Main Methods:

• Synthesis of MIP microspheres using precipitation polymerization with hydroxyproline as a template.
• Immobilization of MIP microspheres in microtiter plates for selective dansyl-proline adsorption.
• Quantification via peroxyoxalate chemiluminescence (PO-CL) reaction enhanced by imidazole.

Main Results:

• The MIP cavity, templated with hydroxyproline, demonstrated enhanced specificity and reduced non-specific adsorption for proline.
• A linear relationship was observed between relative CL intensity and proline concentration (1x10⁻⁶ to 4x10⁻⁵ mol L⁻¹).
• A low limit of detection (3x10⁻⁷ mol L⁻¹) and good precision (R.S.D. 3.7%) were achieved.

Conclusions:

• The developed MIP-CL method provides a highly specific and sensitive approach for proline determination.
• The method's design, utilizing a smaller MIP cavity, effectively improves recognition of dansyl-proline.
• This technique shows significant potential as a valuable analytical tool for proline analysis in real-world samples.