Fluorometric determination of thiazole-containing compounds

Area of Science:

• Analytical Chemistry
• Spectroscopy
• Organic Chemistry

Background:

• Existing spectrophotometric methods for thiazole determination are limited.
• Previous fluorometric applications of thionine were restricted to inorganic sulfur analysis.
• Need for sensitive and selective methods for thiazole and its congeners.

Purpose of the Study:

• To develop and characterize a sensitive fluorescence spectroscopy method for thiazole determination.
• To adapt and validate the method for quantifying the antibiotic thiopeptin.
• To assess the method's selectivity, precision, and accuracy.

Main Methods:

• Utilized fluorescence spectroscopy with thionine treatment for thiazole derivatization.
• Applied the developed method to determine submicrogram quantities of thiazole rings.
• Validated the method for thiopeptin quantification in medicated feed samples.

Main Results:

• Achieved high selectivity for thiazole rings, distinguishing them from fused-ring and reduced analogs.
• Demonstrated excellent precision (+/- 2% RSD) at 15 ng/ml thiazole concentration with a 3:1 signal-to-noise ratio.
• Showcased high accuracy (5% MRE) for thiopeptin determination in the 5-20 ppm range.

Conclusions:

• The developed fluorescence spectroscopy method is sensitive and selective for thiazole ring determination.
• This approach enables accurate quantification of thiazole-containing compounds like thiopeptin.
• The method holds promise for analyzing thiazole derivatives in complex matrices.