Related Experiment Videos
Reactivity of creatinine with alkaline 3,5-dinitrobenzoate: a new fluorescent kidney function test
1Department of Chemistry, University of Regina, Saskatchewan, Canada.
Clinical Biochemistry
|April 1, 1995
Summary
A new fluorometric assay for creatinine determination was developed using 3,5-dinitrobenzoate under alkaline conditions. This method offers enhanced specificity and sensitivity, with a detection limit well below 1 mumol/L for creatinine.
Area of Science:
- Analytical Chemistry
- Biochemistry
Background:
- Creatinine is a key biomarker for kidney function.
- Existing creatinine assays may lack specificity or sensitivity.
Purpose of the Study:
- To develop a novel quantitative fluorometric assay for creatinine.
- To enhance assay specificity and inherent fluorescence sensitivity.
Main Methods:
- Creatinine reacts with 3,5-dinitrobenzoate under alkaline conditions to form a fluorophore.
- Evaluated fluorophore development using Group 1A bases in aqueous and mixed solvents.
- Optimized reaction conditions using LiOH in water/dimethylsulfoxide and water/1,4-butanediol.
Main Results:
- A fluorescent product with excitation/emission maxima at 410/475 nm was generated.
- Rapid reaction observed with Group IA bases, particularly LiOH in mixed solvents.
- Linear calibration curve obtained for creatinine concentrations from 5-50 mumol/L.
- Detection limit below 1 mumol/L achieved.
Conclusions:
- A simple, sensitive, and highly specific fluorometric method for creatinine determination has been successfully developed.
- This assay shows promise for accurate and reliable creatinine quantification.