Analytical Quality by Design Based Systematic Development and Optimization of a Sensitive Bioanalytical Method for...

Area of Science:

• Analytical Chemistry
• Pharmaceutical Analysis

Background:

• Estimating cinacalcet HCl in biological samples like serum lacks straightforward methods.
• Developing a reliable analytical technique is crucial for therapeutic drug monitoring and research.

Purpose of the Study:

• To develop and validate a simple, precise, and rapid Quality by Design (QbD) enabled reverse-phase Ultra-Fast Liquid Chromatography (RP-UFLC) method.
• To quantify cinacalcet HCl in both solution and biological matrices such as blood.

Main Methods:

• Optimization of critical method parameters (mobile phase composition, flow rate, injection volume) using a Box-Behnken design and response surface methodology.
• Utilized a C18 column with an acetonitrile and Tetrabutyl Ammonium Hydrogen Sulphate mobile phase, flow rate of 1 mL/min, and UV detection at 223 nm.
• Method validation included specificity, linearity, accuracy, precision, and sensitivity assessments.

Main Results:

• The optimized method achieved a retention time of 4.3 minutes with no interfering peaks, demonstrating specificity.
• High accuracy (96.83%-101.32% recovery) and precision (RSD < 2.12%) were observed.
• The method exhibited excellent linearity (R² = 0.999) over a wide concentration range (100-100,000 ng/mL) and sensitive detection limits.

Conclusions:

• The developed QbD-enabled RP-UFLC method is robust, accurate, and cost-effective for cinacalcet HCl analysis.
• The method is suitable for routine quality control in research laboratories and for pharmacokinetic studies.
• This validated method addresses the need for a straightforward analytical approach for cinacalcet HCl in biological samples.