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pH-Sensitive blue and red N-CDs for L-asparaginase quantification in complex biological matrices. | LitMetric

pH-Sensitive blue and red N-CDs for L-asparaginase quantification in complex biological matrices.

Spectrochim Acta A Mol Biomol Spectrosc

Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt. Electronic address:

Published: January 2025

AI Article Synopsis

Article Abstract

A novel fluorometric method for the determination of L-asparaginase, an enzyme crucial in cancer therapy and food industry applications, is presented. This sensitive and selective approach utilizes L-asparagine and two pH-sensitive carbon dots (blue-N-CDs and red-N-CDs) as probes. The interaction between L-asparagine and L-asparaginase liberates ammonia, causing an increase in pH. This pH change simultaneously decreases the fluorescence of blue-N-CDs while enhancing the emission of red-N-CDs, enabling ratiometric detection of L-asparaginase. Comprehensive characterization of both carbon dots and investigation of their response mechanism towards L-asparaginase were conducted using ultraviolet-visible spectrophotometry, fluorescence spectroscopy, and transmission electron microscopy (TEM) imaging techniques. The designed approach demonstrates outstanding linearity (20 to 2000 U L) and a low detection limit (6.95 U L) for L-asparaginase quantification. Moreover, when tested to human serum samples, the detection system exhibits outstanding selectivity and high recovery rates (96.15% to 99.75%) with low standard deviation, underscoring its suitability for practical implementation in clinical diagnostics.

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http://dx.doi.org/10.1016/j.saa.2024.125161DOI Listing

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pH-Sensitive blue and red N-CDs for L-asparaginase quantification in complex biological matrices.

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