Plan XRPD work around the sample, matrix, and required conclusion
X-ray powder diffraction identifies and characterizes crystalline phases by their distinctive diffraction patterns. The appropriate geometry, sample preparation, amount, method controls, and interpretation depend on whether the question involves identity, phase purity, mixture composition, crystallinity, structural parameters, or regulated release testing.
What the resource covers
- Typical sample amounts, particle-size considerations, and reflection or transmission geometries.
- cGMP testing, USP-based comparisons, method verification, release specifications, and report expectations.
- Quantitative and semi-quantitative analysis, Rietveld refinement, inorganic phase identification, and complex mixtures.
Key scientific takeaways
Sample preparation affects the conclusion
Grinding, preferred orientation, particle statistics, density, and sample-holder geometry can alter pattern quality and quantitative performance.
Quantitation requires matrix awareness
Artificial standards may not reproduce the particle and orientation effects present in real drug-product or process samples.
Regulated work needs a controlled method
cGMP identity or release testing requires an appropriate validated or verified method, specifications, system controls, review, and documented interpretation.
Document details
| Document type | Whitepaper |
|---|---|
| Title | X-ray Powder Diffraction Frequently Asked Questions |
| Author | Triclinic Labs |
| Publication date | Updated 2023 |
Download this Whitepaper
Complete the short request form and the document link will be sent by email.