HPLC-UV Method for Simultaneous Sartan and Statin Quantification
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Solution Overview
Problem
Current methods fail to simultaneously quantify sartan and statin drugs in a mixture and assess potential drug-drug interactions effectively, especially outside the bloodstream in gastric or intestinal compartments, lacking a simple, accurate, and reproducible approach for concurrent therapy management.
Innovation Solution
A method using high-performance liquid chromatography (HPLC) and UV-visible spectrophotometry for simultaneous quantification of losartan and valsartan interacting with statins, employing a mobile phase of acetonitrile and water, with UV detection at specific wavelengths, allowing for the assessment of drug interactions and relative concentrations under various physiological conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate HPLC methods are used for sartan and statin drugs, then detection accuracy is maintained, but analysis time increases and productivity decreases
Solution Approach 1:
The patent combines the detection of sartan and statin drugs into a single HPLC method with a unified mobile phase composition (acetonitrile-water-phosphoric acid in 60:40:0.1 ratio). This merging allows simultaneous quantification of both drug classes under identical chromatographic conditions, eliminating the need for separate analyses while maintaining detection accuracy through optimized UV detection wavelengths for each compound class.
Solution Approach 2:
The HPLC method developed in the patent achieves universal applicability by detecting multiple sartan drugs (losartan, valsartan, irbesartan, candesartan) and multiple statin drugs (atorvastatin, simvastatin, rosuvastatin, pravastatin) using the same chromatographic conditions, mobile phase, and column system. This multi-functional approach enables a single method to serve multiple detection purposes that previously required separate specialized methods.
2Adaptability or versatility
If multiple chromatographic parameters are switched to detect different drug combinations, then detection versatility is improved, but method complexity increases
Solution Approach 1:
The patent establishes a universal HPLC detection system that can analyze various sartan-statin combinations without requiring parameter switching. The method uses a standardized mobile phase (acetonitrile-water-phosphoric acid 60:40:0.1), consistent column conditions (C18 column), and optimized UV detection wavelengths that work for all tested sartan and statin drugs, thereby achieving detection versatility through simplicity rather than complexity.
Solution Approach 2:
While maintaining overall method simplicity, the patent optimizes specific detection parameters for different drug classes within the unified system. UV detection wavelengths are selected based on the specific absorption characteristics of sartan and statin compounds, allowing accurate simultaneous detection without changing the fundamental chromatographic conditions. This targeted parameter optimization enables versatility while avoiding method complexity.
3Reliability
If drug interactions are assessed in gastric or intestinal compartments, then clinical relevance is improved, but measurement difficulty increases
Solution Approach 1:
The patent performs preliminary dissolution of sartan and statin drugs in simulated gastric fluid (pH 1.2) and simulated intestinal fluid (pH 6.8) before HPLC analysis. This preliminary action mimics the physiological conditions of gastric and intestinal compartments, allowing assessment of drug interactions in clinically relevant environments. The dissolution step prepares the samples in advance, making the subsequent HPLC measurement straightforward and reliable.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method provides a precise, accurate, and economical way to assess drug interactions and optimize drug regimens, reducing the risk of over- or under-dosing and side-effects by enabling simultaneous quantification and interaction analysis of multiple sartan and statin drugs under the same chromatographic conditions.
Implementation Method 1
applying the mixture to a RP-HPLC column in a mobile phase comprising acetonitrile and water
Implementation Method 2
detecting sartans and statins in said mixture by UV absorption
Data Source
AI summary
The invention is directed to a precise, accurate and economical method for the simultaneous quantification of amounts of a dissolved sartan and dissolved statin in a mixture containing at least one sartan and at least one statin.