Simultaneous Estimation of Telmisartan, Chlorthalidone, Amlodipine Besylate and Atorvastatin by RP-HPLC Method for Synchronous Assay of Multiple FDC Products Using Analytical FMCEA-Based AQbD Approach

Green and Sustainable Analytical Chemistry-Driven Chromatographic Method Development for Stability Study of Apixaban Using Box-Behnken Design and Principal Component Analysis

Apixaban (APX) is a novel anti-coagulant drug approved by USFDA. According to referred literature, numerous chromatographic methods such as RP-HPLC and high-performance thin-layer chromatography have been published for the stability study of APX. But these chromatographic methods have been developed using toxic organic solvents that are hazardous to the environment and unsafe for analysts. Hence, green and sustainable analytical chemistry-driven chromatographic method has been developed for the stability study of APX using safe organic solvents for the safety of analysts and the protection of the environment. APX was subjected to forced degradation for the development of a stability-indicating assay method. The method development was carried out by the implementation of chemometric and DoE approaches for minimizing solvent wastage. Principal component analysis was applied for the identification of critical method risk variables (MRVs) and method performance attributes. DoE-based response surface modelling was applied for the optimisation of critical MRVs. The greenness profile scales of published and developed chromatographic methods have been assessed by NEMI and AGREE methods for the estimation of APX. The developed method was found to be more eco-friendly and robust than the published chromatographic methods for the estimation of APX.

AQbD TLC-densitometric method approach along with green fingerprint and whiteness assessment for quantifying two combined antihypertensive agents and their impurities

Preserving the environment, reducing the amount of waste resulting from chemical trials, and reducing the amount of energy consumed have currently become a pivotal global trend. An analytical quality by design (AQbD) based eco-friendly TLC-densitometric method was implemented for quantifying two antihypertensive agents, captopril (CPL) and hydrochlorothiazide (HCZ), along with their impurities; captopril disulphide (CDS), chlorothiazide (CTZ) and salamide (SMD). The analytical target profile (ATP) was first identified, followed by selecting the critical analytical attributes (CAAs), such as retardation factors and resolution between the separated peaks. Critical method parameters (CMPs) that may have a crucial influence on CAAs were identified and emanated through the quality risk assessment phase. A literature survey-based preliminary studies were performed, followed by optimization of the selected CMPs through a custom experimental design to attain the highest resolution with optimum retardation factors. Moreover, method robustness was also tested by testing the design space. Complete separation of the drugs and their impurities was achieved using ethyl acetate: glacial acetic acid (6: 0.6, v/v) as a developing system applied to a 12 cm length TLC plate at room temperature with UV scanning at 215 nm. Calibration graphs were found to be linear in the ranges of (0.70-6.00), (0.10-2.00), (0.20-1.00), (0.07-1.50) and (0.05-1.00) µg/band corresponding to CPL, HCZ, CDS, CTZ, and SMD, respectively. Four different green metric tools were used to evaluate the greenness profile of the proposed method, and results showed that it is greener than the reported HPLC method. Method whiteness assessment was also conducted. Moreover, the method performance was evaluated following the ICH guidelines, and the outcomes fell within the acceptable limits. The developed method could be approved for routine assay of the cited components in their pharmaceutical formulations and bulk powder without interference from the reported impurities. The issue of concern is saving money, especially in developing countries.

Simultaneous Chromatographic Estimation of Vildagliptin and Dapagliflozin Using Hybrid Principles of White Analytical Chemistry and Analytical Quality by Design

BACKGROUND

The fixed-dose combination of vildagliptin (VDG) and dapagliflozin (DGZ) is used in the treatment of type 2 diabetes mellitus. According to the literature survey, RP-HPLC and HPTLC methods have been reported for routine analysis of VDG and DGZ. These chromatographic methods have been developed using potentially neurotoxic and teratogenic solvents, which are unsafe for human and aquatic animal life and hazardous to the environment. These types of organic solvents shall be replaced or reduced during chromatographic analysis of drugs for the safety of human and aquatic animal life and the protection of the environment. The novel white analytical chemistry (WAC) approach has been introduced, which emphasizes robust, green, user-friendly, economical, and rapid analysis of drug samples.

OBJECTIVE

Hence, the WAC-based RP-HPLC method has been developed for the estimation of VDG and DGZ using lower toxic and economical solvents.

METHOD

The development of the RP-HPLC method includes the implementation of the analytical quality by design approach using principles of design of experiments to reduce organic waste generation and regulatory compliance of analytical method. The central composite design was applied for response surface modeling (RSM) and optimization of the RP-HPLC method. The method validation was carried out according to ICH Q2 (R1) guidelines.

RESULTS

The fixed-dose combinations of VDG and DGZ were assayed, and results were found in compliance with their labeled claim. The published and proposed RP-HPLC methods were assessed for chromatographic analysis of VDG and DGZ using the Red-Green-Blue (RGB) model, AGREE calculator, Eco-Scale Assessment tool, GAPI software, and NEMI standards.

CONCLUSIONS

The proposed method was found to be robust, green, economical, and user-friendly for chromatographic analysis of VDG and DGZ. The proposed method can be an economical and eco-friendly analytical tool in the pharmaceutical industry for quality control and routine analysis of fixed-dose combinations of VDG and DGZ.

HIGHLIGHTS

Hybrid principles of WAC and analytical quality by design to RP-HPLC method for simultaneous estimation of VDG and DGZ in their fixed-dose combinations.

Principles of White Analytical Chemistry and Design of Experiments to Development of Stability-Indicating Chromatographic Method for the Simultaneous Estimation of Thiocolchicoside and Lornoxicam

BACKGROUND

A variety of chromatographic methods have been published for the stability evaluation of thiocolchicoside (THC) and lornoxicam (LNX). Nevertheless, the development of chromatographic methods requires the use of neurotoxic and teratogenic organic solvents that are detrimental to the environment and harmful to human life.

OBJECTIVES

Using the principles of design of experiments (DoE), a novel white analytical chemistry-driven stability-indicating high-performance thin-layer chromatographic (SI-HPTLC) method has been developed for the concurrent stability study of THC and LNX. To protect the environment and human life, the stability-indicating HPTLC method was developed using safe organic solvents.

METHOD

Potential analytical method risk parameters (AMRPs) and analytical method performance attributes (AMPAs) were screened using the fractional factorial design. The response surface analysis and optimization of critical AMRPs and AMPAs was carried out using full factorial design. Navigation of the method operable design region (MODR) was used to develop the SI-HPTLC technique. The developed method was validated in accordance with the International Council for Harmonization (ICH) Q2 (R1) guideline.

RESULTS

The developed method's greenness was evaluated using the AGREE (Analytical Procedure Greenness) tool and ESA (Eco-Scale Assessment). The Blue (B) model was used to assess the proposed method's cost and time efficiency and user-friendliness. For the stability studies of THC and LNX, the 12 principles of WAC (white analytical chemistry) were used to evaluate the published and proposed chromatographic techniques.

CONCLUSIONS

Compared to previously published chromatographic techniques for studying the stability of THC and LNX, the suggested approach was found to be more affordable, environmentally friendly, and user-friendly.

HIGHLIGHTS

The development of a stability-indicating HPTLC method using a novel white analytical chemistry approach and organic solvents with low toxicity potential. Application of the developed method for analysis of the forced degraded sample and fixed-dose combinations of THC and LNX.

Red, Green, and Blue Model-Based Assessment and Principles of White Analytical Chemistry to Robust Stability-Indicating Chromatographic Estimation of Thiocolchicoside and Diclofenac Sodium

BACKGROUND

White analytical chemistry (WAC) is a recent approach for evaluating analytical procedures based on their effectiveness in validating results, capacity to be environmentally friendly, and economic effectiveness.

OBJECTIVE

The detection of diclofenac sodium (DCF) and thiocolchicoside (THC) simultaneously has been established using a WAC-driven stability-indicating chromatographic method (SICM).

METHODS

For the concurrent stability study of THC and DCF, the suggested chromatographic technique was developed employing safe and environmentally acceptable organic solvents. To identify critical analytical method parameters (AMPs) and analytical quality attributes (AQAs), a design of experiments (DoE)-based screening design was applied. For the DoE-based response surface modelling (RSM) of critical AMPs and AQAs, the Box-Behnken design (BBD) was employed.

RESULTS

A robust SICM was developed by navigating the analytical design space for simultaneous estimation of THC and DCF. IR, NMR, and mass spectral data were used to characterize the degradation products. Red, green, and blue (RGB) models were used to evaluate the suggested method's validation effectiveness, greenness power, and economic efficiency and compared to published chromatographic techniques. The effectiveness of the chromatographic method's validation concerning the International Council for Harmonization (ICH) Q2 (R1) guideline was evaluated using the red model. The analytical greenness (AGREE) evaluation tool and eco-scale assessment (ESA) approach were used to evaluate the green model's methodology. The blue model-based assessment was carried out for comparison of simplicity of instruments handling, cost, and time during sample analysis. The red, blue, and green scores of the techniques were averaged to arrive at the white score of the suggested and reported methods.

CONCLUSION

For the concurrent stability study of THC and DCF, the suggested technique was shown to be validated, environmentally friendly, and cost effective. The suggested approach could be a cost-effective and environmentally friendly analytical technique for determining the stability and monitoring the quality of fixed-dose combinations (FDC) of THC and DCF.

HIGHLIGHTS

Stability-indicating HPTLC method was developed for concomitant analysis of THC and DCF using concepts of DoE and WAC.