Source comparison
TB-500 Research Measurement Tools: Method Comparison
UV-Vis Spectrophotometer Peptide concentration quantification 10µg/mL 5 minutes per sample Fastest method for concentration but cannot distinguish degradation products. Combine with HPLC for complete characterization Reverse-Phase HPLC Purity verification and
This comparison does not assign a generated winner or score.
- UV-Vis Spectrophotometer
- Peptide concentration quantification
- 10µg/mL
- 5 minutes per sample
- Fastest method for concentration but cannot distinguish degradation products. Combine with HPLC for complete characterization
- Reverse-Phase HPLC
- Purity verification and impurity profiling
- 1µg/mL (UV), 0.1µg/mL (MS)
- 30–60 minutes per sample
- Gold standard for purity analysis. Essential for validating peptide quality before functional studies
- LC-MS
- Molecular weight confirmation and structural integrity
- 0.1µg/mL
- 45–90 minutes per sample
- Most definitive method but requires specialized instrumentation. Use when spectrophotometry and HPLC results conflict
- Microplate Reader (absorbance)
- Cell proliferation and metabolic assays
- Varies by assay (typically 1,000–10,000 cells/well)
- 10 minutes for plate read
- Quantifies biological function rather than chemical properties. Indispensable for mechanism studies
- Microplate Reader (fluorescence)
- Cell migration, angiogenesis, and live-cell imaging
- Varies by dye and cell type
- 10–30 minutes for plate read
- Higher sensitivity than absorbance but requires fluorescent labels. Best for dynamic endpoints like migration