Introduction of novel statistical technique for computing the interaction of lomefloxacin (LOME) and lanthanum (Ln) was the main purpose of this research. Moreover, using lanthanum as example of lanthanides for such interaction had not been exploited before. Screening of four factors affecting the interaction as metal volume, pH, temperature and reaction time was executed applying Plackett–Burman design where Pareto plots and ANOVA testing were used to pool off the insignificant factor. Accordingly, the imperative factors were optimized using Box–Behnken design after fine-tuning of the upper and lower levels values. 3-D surface plots and 2-D contour plots were chosen to evaluate the interaction between factors, followed by optimization plots to obtain the best blend of factors harmonized together and model confirmation was verified with three target points. Responses were measured as maximum absorbance; Y1 for technique (A) and maximum fluorescence intensity; Y2 for technique (B) using the resulted optimal conditions. Determination of LOME was applied with successful wide working range of (0.900–15.520, 0.070–1.552 µg/mL) for Y1 and Y2, respectively, with LOD and LOQ figured as 0.252, 0.763 µg/mL for Y1 and 0.0177, 0.0536 µg/mL for Y2. High degree of accuracy and precision was maintained in both pure and dosage forms findings. The techniques were found to be robust and adequate. Selectively of the models were proven by satisfactory % recovery calculations in interference tests.
Statistical screening and optimization of the factors affecting the absorbance and fluorescence intensities of complexation of Lomefloxacin with lanthanum were achieved, followed by model confirmation and determinations in pure and dosage forms of the drug.
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One factor at a time
Double distilled water
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Relative standard deviation
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The authors express their gratitude to Qatar University for financially supporting this work through an Internal Grant.
The authors declare that they have no competing interest.
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El-Hamshary, M.S., Hanafi, R.S., Fouad, M.A. et al. Spectrophotometric and spectrofluorimetric determinations of lomefloxacin lanthanum complex in tablets using multivariate modeling and optimization stratagem. J IRAN CHEM SOC (2021). https://doi.org/10.1007/s13738-021-02162-7
- Plackett–Burman design
- Box–Behnken design
- Multivariate modeling