Chromatographic Behaviour of Antibiotics on Thin Layers of Zeolite
Adham Raeisi
Department of Chemistry, University of Sistan and Baluchestan, Zahedan, Iran.
Mostafa Ramezani *
Department of Amalytical Chemistry, Islamic Azad University, North Tehran Branch, Theran, Iran.
Hossein Ravazadeh
Department of Persian Medicine, Tehran University of Medical Sciences, Tehran, Iran.
Mahdi A. Taher
Department of Management Strategic and Engineering, University of Tehran, Iran.
*Author to whom correspondence should be addressed.
Abstract
Introduction: Antibiotics analysis is performed by many methods such as spectrophotometry, fluorimetry, polarography, and high-performance liquid chromatography. This analysis doesn't require derivatization but requires expensive equipment and extensive preparation. When more than one antibiotic is present in a formulation, interactions may occur between the drugs that must be separated before measurement. Thin-layer chromatography is a useful technique for identifying antibiotics because of the low cost, high speed, and low servicing. Silica gel adsorbents have often been used as adsorbents in all thin-layer chromatography studies. In this study, zeolite was used as an adsorbent in thin- layer chromatography with high selectivity.
Materials and Methods: The chromatographic behaviour of amoxicillin, ampicillin, cefazolin, cefixime, ceftriaxone, cefalexin, and penicillin was studied for the first time on a thin layer of zeolite with mobile, organic, and organic- organic phases.
Discussion: The best separation of ceftriaxone from amoxicillin, ampicillin, cefazolin, cefixolin, cefalexin, and penicillin on a thin layer of zeolite using methanol as the mobile phase. The distance and rise time are 12 cm and 110 minutes, respectively.
Conclusion: The results of the present study showed that using the current method, the selectivity of one antibiotic from other components as well as two-component andthree-component adsorption was obtained. Quantitative identification of antibiotics was also performed in multicomponent mixtures after selection of appropriate isolates.
Keywords: Zeolite adsorbent, thin-layer chromatography, antibiotics, chromatographic behaviour.