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Related Experiment Videos

A sequential injection analysis system for potassium clavulanate determination using two potentiometric detectors.

Adriana M Pimenta1, Alberto N Araújo, Maria Conceição B S M Montenegro

  • 1CEQUP/Departamento Qui;mica-Fi;sica, Faculdade de Farmácia, Universidade do Porto, Rua Ani;bal Cunha 164, 4050, Porto, Portugal.

Journal of Pharmaceutical and Biomedical Analysis
|November 1, 2002
PubMed
Summary

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A new flow system enables simultaneous potentiometric analysis of potassium clavulanate in pharmaceuticals. This method offers real-time quality control and stability monitoring for drug formulations.

Area of Science:

  • Analytical Chemistry
  • Pharmaceutical Analysis
  • Electrochemistry

Background:

  • Accurate quantification of active pharmaceutical ingredients (APIs) like potassium clavulanate is crucial for drug quality.
  • Traditional analytical methods can be time-consuming and may not offer real-time monitoring capabilities.
  • Sequential injection analysis (SIA) offers a platform for automated and efficient chemical analysis.

Purpose of the Study:

  • To develop and validate a multi-task flow system for the simultaneous determination of potassium clavulanate.
  • To implement potentiometric methods for the selective detection of both the clavulanate anion and potassium cation.
  • To assess the system's suitability for real-time analytical control and stability monitoring in pharmaceutical formulations.

Main Methods:

Related Experiment Videos

  • Development of a sequential injection analysis (SIA) system incorporating two independent potentiometric detection channels.
  • Utilized ion-selective electrodes for the simultaneous, in-line measurement of clavulanate and potassium ions.
  • Performed method validation including determination of analytical range, precision (RSD), sampling frequency, and accuracy (relative error).

Main Results:

  • The developed SIA system achieved simultaneous detection of clavulanate and potassium with an analytical range of 2 mM–0.1 M.
  • High precision was demonstrated with relative standard deviations of 0.5% for clavulanate and 0.6% for potassium.
  • The system provided accurate results with relative errors less than 2% compared to reference methods, operating at 53 samples/hour.

Conclusions:

  • The multi-task flow system based on SIA and potentiometry provides a robust and efficient method for potassium clavulanate analysis.
  • Simultaneous dual-analyte detection enables real-time standardization, fault detection, and monitoring of chemical stability.
  • This approach enhances quality control processes for pharmaceutical formulations containing potassium clavulanate.