مجلة التربية والعلم (Dec 2013)

Spectrophotometric determination of chloramphenicol (after reduction) by nitrogen and conjugation using fluorochlosinol reagent - application to eye drops

  • Waadallah Bashir,
  • Tamador Hamoudi

DOI
https://doi.org/10.33899/edusj.2013.163096
Journal volume & issue
Vol. 26, no. 5
pp. 138 – 155

Abstract

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ABSTRACT A spectrophotometric method for the assay of micro amounts of chloramphenicol was developed. This method is based on the reduction of the nitro-group of chloramphenicol to amino-group, followed by diazotization and coupling with phloroglucinol in alkaline medium to form a stable yellow azo dye which shows maximum absorption at 419 nm. Beer's law is obeyed over the concentration range (0.4 – 40) ppm. The molar absorptivity is (1.5437×104) l.mol-1.cm-1 and Sandell sensitivity index of (0.021) µg / cm2with a relative error of -1.8 to -0.52% and a relative standard deviation of ± 4.0 to ± 0.69%. The propose method has been applied to the determination of chloramphenicol in eye drop.

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