Chromatographic and Spectrophotometric Determination of Clindamycin in Pharmaceutical Products

Idrees Faleh Al-Momani; Lana Mohammad Zaid Al-Kilani

doi:10.22146/ijc.91599

Chromatographic and Spectrophotometric Determination of Clindamycin in Pharmaceutical Products

https://doi.org/10.22146/ijc.91599

Idrees Faleh Al-Momani^(1*), Lana Mohammad Zaid Al-Kilani⁽²⁾

(1) Department of Chemistry, Faculty of Science, Yarmouk University, Irbid 21163, Jordan
(2) Department of Chemistry, Faculty of Science, Yarmouk University, Irbid 21163, Jordan
(*) Corresponding Author

Abstract

Accurate, precise, and reliable chromatographic and spectrophotometric methods were developed for determining clindamycin (CLD) in pharmaceutical formulations. The spectrophotometric method was adopted for flow injection analysis (FIA). The method is based on the online oxidation of CLD and measuring the absorbance of the resulting product using a flow cell at 605 nm. Experimental conditions, including FIA variables and reaction conditions, were optimized. The chromatographic separation was achieved using a C₈ column and an isocratic mobile phase. The composition of the mobile phase selected for the analysis consists of a mixture of phosphate buffer (50%), MeOH (35%), and ACN (15%), adjusted to a pH of 3.47 by phosphoric acid. The eluent was monitored with a UV detector at 205 nm. The linearity range was 10–200 and 50–800 µg/mL for the FIA and HPLC, respectively. The applicability of the FIA and HPLC methods was validated by analyzing CLD in synthetic and commercial pharmaceutical products. No significant interferences were observed from the common excipients usually used in commercial formulations.

Keywords

clindamycin; FIA; HPLC; pharmaceutical products; spectrophotometry

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DOI: https://doi.org/10.22146/ijc.91599