Abstract
Background
Metformin hydrochloride is a common anti-diabetic medication, frequently prescribed in fixed-dose combinations for diabetes treatment. Various analytical methods, such as RP-HPLC and HPTLC, are employed to ensure the quality of these fixed-dose combinations. However, many of these methods utilized harmful organic solvents with potential environmental consequences. Consequently, there is a growing demand for greener and safer chromatographic methods. A recent concept of white analytical chemistry, emphasizes the development and assessment of chromatographic techniques based on validation, cost, time, and environmental sustainability.
Objectives
In line with this concept, an RP-HPLC method has been developed for the synchronous estimation of multiple fixed-dose combinations (FDCs) of metformin hydrochloride, utilizing low-toxic and economical solvents under a single chromatographic condition.
Methods
The RP-HPLC method was developed using the AQbD approach, which integrates analytical quality risk assessment and DoE principles. The goal was to reduce organic waste and ensure compliance with regulatory standards. The method was subsequently rigorously validated following ICH Q2 (R1) guidelines.
Results
The chromatographic separation of metformin and other drugs have been carried out using a Shim-Pack C18 column (250 mm × 4.6 mm, 5.0 µm) as stationary phase and the mobile phase, composed of ethanol: water (70 + 30, v/v) at pH 3.0 (adjusted using glacial acetic acid). The developed method was found to be specific, accurate, precise, robust and sensitive for estimation of multiple FDCs of metformin. The method was applied effectively to various metformin hydrochloride fixed-dose combinations, confirming label claim compliance. This method was also compared with published RP-HPLC methods, which were evaluated based on white analytical chemistry principles.
Conclusion
In conclusion, the proposed white analytical chemistry-driven RP-HPLC method offers a safe, cost-effective, and eco-friendly alternative to existing techniques for quality control and routine analysis of multiple fixed-dose combinations of metformin hydrochloride in the pharmaceutical industry.
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Abbreviations
- ICH:
-
International council for harmonization
- RP-HPLC:
-
Reversed-phase high-pressure liquid chromatography
- IP:
-
Indian Pharmacopoeia
- PDE:
-
Permitted daily exposure
- WAC:
-
White analytical chemistry
- AQbD:
-
Analytical quality by design
- AQRM:
-
Analytical quality risk management
- DoE:
-
Design of experiments
- CPPs:
-
Critical procedure parameters
- CMPAs:
-
Critical method performance attributes
- GAC:
-
Green analytical chemistry
- QRM:
-
Quality risk management
- MET:
-
Metformin hydrochloride
- NATE:
-
Nateglinide
- DGZ:
-
Dapagliflozin
- GLB:
-
Glyburide
- REPA:
-
Repaglinide
- RSM:
-
Response surface modeling
- AGREE:
-
Analytical greenness
- GAPI:
-
Green analytical procedure index
- NEMI:
-
National environmental method index
- FDCs:
-
Fixed-dose combinations
- APIs:
-
Active pharmaceutical ingredients
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Acknowledgements
The Maliba Pharmacy College’s Principal and the Uka Tarsadia University’s Provost are thanked by the authors for their enormous help in providing the necessary infrastructure and instrumentation equipment to carry out the research endeavor. Their contributions were crucial to the accomplishment of this investigation.
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Dr PP—drafting, conceptualization, supervision, review. BR—methodology and writing. VSP—review, software analysis handling and drafting. AM—supervision and review support.
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Prajapati, P., Rana, B., Pulusu, V.S. et al. Multipurpose RP-HPLC Method for Simultaneous Estimation of Fixed-Dose Combinations of Anti-diabetic Drugs: Integrating Green, Economical, and Robust Approaches with Design of Experiments and White Analytical Chemistry. Chemistry Africa 7, 1385–1400 (2024). https://doi.org/10.1007/s42250-023-00835-9
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DOI: https://doi.org/10.1007/s42250-023-00835-9