Thin-layer chromatography--an image-processing method for the determination of acidic catecholamine metabolites

Area of Science:

• Analytical Chemistry
• Biochemistry

Background:

• Acidic catecholamine metabolites are important biomarkers.
• Accurate quantification of these metabolites is crucial for diagnosing various conditions.

Purpose of the Study:

• To develop a sensitive and convenient method for determining acidic catecholamine metabolites.
• To enable simultaneous quantification of multiple metabolites from biological samples.

Main Methods:

• Thin-layer chromatography (TLC) on RP-18W plates.
• Image-processing analysis for quantification.
• Detection using 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical.

Main Results:

• Successful separation of acidic catecholamine metabolites without prederivatization.
• High sensitivity with limits of detection (LOD) and quantification (LOQ) in the ng/spot range.
• Excellent mean recoveries (95-106%) and a wide linear range.
• Demonstrated applicability for simultaneous determination in spiked human urine.

Conclusions:

• The developed TLC and image-processing method is sensitive, convenient, and rapid.
• It allows for the simultaneous determination of key acidic catecholamine metabolites.
• This method holds promise for clinical and research applications involving urine analysis.