Verification Standards
In analytical testing, purity percentages can vary between laboratories due to differences in methodology. This is normal and is one reason we focus on documentation transparency and independent verification standards.
Why results vary between labs
Small methodological differences can influence reported purity, including:
- HPLC method parameters (column type, gradient, detection wavelength)
- Integration thresholds
- Calibration standards
- Sample preparation procedures
Minor methodological differences can account for approximately ±1% analytical variance in reported purity.
Why we prioritise verification over “marketing numbers”
A purity percentage alone does not capture testing methodology, chromatographic resolution, or independent accountability. We therefore prioritise:
- Third-party testing where applicable
- Clear documentation and traceability
- Transparent research-use-only policies
- Consistent storage and handling standards
Research use only
All Signal Labs products are supplied strictly for research purposes only and are not intended for human consumption.