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Published on: November 20, 2013

Non-enzymatic optical sensor for penicillins.

H He¹, H Li, G Uray

¹Institute of Organic Chemistry, Karl-Franzens University, A-8010 Graz, Austria.

|March 1, 1993

Summary

A novel non-enzymatic fluorosensor detects penicillin V and G using an anion carrier and proton receptor in a PVC membrane. This optical sensor offers reversible detection for pharmaceutical and bioreactor applications.

Area of Science:

Analytical Chemistry
Chemical Sensors
Biomedical Engineering

Background:

Traditional penicillin detection often relies on enzymatic methods.
There is a need for alternative, non-enzymatic sensing platforms for penicillin.
Optical sensors offer potential for real-time, sensitive detection.

Purpose of the Study:

To develop and characterize the first non-enzymatic fluorosensor for penicillin detection.
To investigate the sensor's response mechanism and selectivity.
To evaluate the sensor's applicability in pharmaceutical analysis.

Main Methods:

Fabrication of a dyed poly(vinyl chloride) (PVC) membrane incorporating an anion carrier and a lipophilic proton receptor (Nile Blue).
Utilizing fluorescence intensity changes to monitor penicillin concentration.

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Testing sensor response to various penicillin types and interfering anions.

Main Results:

The sensor demonstrated reversible response to penicillin V (0.01–10mM) and penicillin G (0.03–10mM).
Significant interference was observed from nitrate, salicylate, and ascorbate, though these are typically absent in target applications.
The sensor showed no response to penicillins with aliphatic amino groups, such as amoxicillin.
Successful application for determining penicillin G in pharmaceutical formulations.

Conclusions:

A novel, enzyme-free optical sensor for penicillin detection has been successfully developed.
The sensor utilizes a combination of anion transport and fluorescence quenching/enhancement mechanisms.
This technology holds promise for penicillin monitoring in pharmaceutical and biotechnological settings.