Mass-to-charge signals and expected identity
Mass spectrometry detects ions according to their mass-to-charge ratio. Interpretation can provide information related to molecular mass and whether observed signals are consistent with the expected material.
The expected identity matters to the analytical question. Share the sample name and relevant supplier documentation when asking about the testing scope. Do not infer an identity solely by comparing the visual shape of two spectrum plots.
A mass match has limits
Mass-related evidence can support an identity assessment, but matching mass alone does not prove every structural detail or a complete sequence. Materials with different structures can require further analytical work to distinguish.
This website offers an MS identity check, not an unlimited structural characterization service. Ask which conclusion the agreed method can support and which questions remain outside its scope. We do not promise sequencing or additional methods unless separately confirmed.
Use HPLC and MS for complementary evidence
MS and HPLC answer different questions. HPLC supplies purity-related chromatographic information. MS supplies mass-related identity information. An identity-consistent mass signal alone does not establish purity.
For buyers evaluating both purity and identity before shipment, combined HPLC + MS testing is recommended. Confirm suitability before submitting the sample, especially if your purchasing concern requires information beyond these two methods.
Prepare a useful inquiry
Describe the expected sample identity and the question you need answered. For multiple samples, label them distinctly and explain whether the same scope is required for each. We will confirm sample requirements, price, and turnaround time before delivery.
- Include the peptide / sample name or reference.
- State whether you need MS alone or HPLC + MS.
- Share relevant document context without assuming comparability.
- Review the English report within the agreed analytical scope.
Keep identity evidence tied to the submitted sample
Even an informative identity check describes only the received material. It cannot establish that all other containers contain the same material or that a later shipment matches the tested sample.
Use the findings alongside the order reference, supplier documentation, and your sampling arrangements. The final purchasing and shipment decision remains yours.