Strategies for the assessment of matrix effect in quantitative bioanalytical methods based on HPLC-MS/MS
B K Matuszewski1, M L Constanzer, C M Chavez-Eng
1Merck Research Laboratories, West Point, Pennsylvania 19486, USA. bogdan_matuszewski@merck.com
Analytical Chemistry
|September 11, 2003
Summary
High-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) can lack selectivity due to matrix effects. This study details methods to assess and mitigate these effects for reliable bioanalysis, including comparing interfaces.
Area of Science:
- Bioanalytical Chemistry
- Pharmacokinetics
- Analytical Method Development
Background:
- High-performance liquid chromatography with tandem mass spectrometric detection (HPLC-MS/MS) is crucial for quantifying drugs in biological fluids.
- However, ion suppression/enhancement from sample matrices and metabolites can compromise HPLC-MS/MS selectivity and reliability.
- Existing validation guidelines lack detailed procedures for assessing matrix effects in bioanalytical methods.
Purpose of the Study:
- To address the need for reliable HPLC-MS/MS method development and validation, particularly for human pharmacokinetic studies.
- To present practical experimental approaches for assessing, identifying, and mitigating matrix effects in quantitative HPLC-MS/MS analyses.
- To introduce quantitative assessments of absolute versus relative matrix effects and determine true analyte recovery.
Main Methods:
- Development and application of experimental procedures to quantitatively assess matrix effects.
- Determination of 'true' analyte recovery in the presence of biological matrices.
- Comparison of matrix effects using two different HPLC-MS/MS interfaces: heated nebulizer (HN) and ion spray (ISP).
Main Results:
- The study introduces quantitative methods for assessing absolute and relative matrix effects and true analyte recovery.
- Determination of matrix effects aids in evaluating the reliability and selectivity of HPLC-MS/MS methods.
- For the studied drug, the matrix effect was significant with the ISP interface but absent with the HN interface.
Conclusions:
- Practical experimental approaches can effectively assess and mitigate matrix effects in HPLC-MS/MS bioanalysis.
- Quantitative assessment of matrix effects is essential for ensuring the reliability and selectivity of quantitative bioanalytical methods.
- Interface selection (e.g., HN vs. ISP) can significantly impact the presence and severity of matrix effects.
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