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Published on: December 25, 2016

Colorimetric quantification of vancomycin by highly active nitroxyl radical compounds.

Kyoko Sugiyama¹, Fumiya Sato¹, Kentaro Yoshida²

¹Faculty of Pharmaceutical Science, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba, Sendai, Miyagi, 981-8558, Japan.

Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry

|November 19, 2024

Summary

Nortropine N-oxyl (NNO), a novel nitroxyl radical, enables rapid, visible colorimetric quantification of vancomycin. This highly active radical offers a sensitive alternative to TEMPO for analytical applications.

Keywords:

NNO Nitroxyl radical TEMPO Vancomycin

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Area of Science:

Organic Chemistry
Analytical Chemistry
Biochemistry

Background:

Stable organic free radicals like 2,2,6,6-tetramethylpiperidine N-oxyl (TEMPO) have diverse applications.
Limitations of TEMPO include low reactivity and insufficient response in certain assays.
Development of highly active nitroxyl radicals with enhanced stability is crucial for improved analytical tools.

Purpose of the Study:

To investigate the reactivity of nortropine N-oxyl (NNO) under physiological conditions.
To develop a colorimetric method for quantifying vancomycin using NNO.
To explore NNO as a potential replacement for TEMPO in analytical probes.

Main Methods:

Utilized NNO's oxidative capability towards 2,2'-dihydroxybiphenyl structures.
Developed a colorimetric assay for vancomycin detection.
Performed quantitative analysis within a specific concentration range (10-100 μM).

Main Results:

NNO successfully oxidized the 2,2'-dihydroxybiphenyl moiety present in vancomycin.
Achieved rapid, visible colorimetric quantification of vancomycin within minutes.
Demonstrated a quantitative range of 10-100 μM for vancomycin detection.

Conclusions:

Nortropine N-oxyl (NNO) is a highly active nitroxyl radical suitable for sensitive analytical applications.
NNO facilitates a rapid and visually detectable colorimetric quantification of vancomycin.
Highly active nitroxyl radical derivatives show promise for developing advanced analytical probes, potentially surpassing TEMPO-based systems.