Inside our quality process
From Our Lab: How Synagenics Tests and Documents Research Peptides
A closer look at the analytical work behind every Synagenics lot, written for researchers who want to understand what our certificates show, how to read them and how to use the public COA library to verify a vial in minutes.
Why we publish the evidence
Most suppliers summarize their testing in a sentence. We would rather show it. Each Synagenics certificate includes the analytical traces that produced the result, so you can read the data directly instead of trusting a number.
This page walks through what those traces mean and how to use them. It is written for researchers, not marketers: no promises about outcomes, only a clear description of how the material is characterized.
What our certificates document
Every published report is built around the same core evidence.
| Compound and sequence | The name of the peptide and, where relevant, its amino acid sequence |
|---|---|
| Lot number | The identifier that links the vial to the report |
| HPLC chromatogram | The separation trace, with the main peak and any impurity peaks |
| Purity value | The main-peak area as a percentage of total detected area |
| Mass spectrum | The observed mass, compared with the expected mass of the intact peptide |
| Test date | When the analysis was performed |
| Testing laboratory | The independent facility that produced the data |
Reading the HPLC chromatogram
The chromatogram is the picture of purity. Time runs along the horizontal axis and detector signal runs vertically. The tallest peak is the target peptide; smaller peaks are other species that left the column at different times.
- Main peak shape. A narrow, symmetrical peak is a good sign. Fronting, tailing or a shoulder can hide a co-eluting impurity.
- Baseline. A flat baseline means little background noise. A drifting baseline can distort integration.
- Small peaks. A few tiny peaks are normal. A cluster of peaks close to the main one deserves a question.
- Method. The report should state the column, gradient and detection wavelength so the result is reproducible.
Reading the mass spectrum
Purity says one compound dominates. The mass spectrum says which compound it is. A peptide in an electrospray source picks up protons and appears at a mass-to-charge value. Software converts the pattern into a molecular mass, and that mass should match the theoretical mass of the sequence.
Look for three things: the expected mass is present, there is no large unexplained signal, and nothing suggests a common modification such as oxidation, which adds 16 Da to methionine-containing peptides. For metal-binding peptides like GHK-Cu, the isotope pattern also confirms the metal.
Verify any Synagenics lot in five minutes
You do not need an account or a phone call.
Read the label
Find the compound name and lot number on your vial.
Search the library
Go to the COA library and search by compound or lot number.
Match the details
Confirm the compound, lot number and test date on the report.
Inspect the data
Read the chromatogram and the mass spectrum, not only the headline number.
Save a copy
Store the report with your lab records so every dataset can be traced to its lot.
Using the library to compare lots
Because certificates are public, the library is also a record of consistency.
Compare across lots
Reports for several lots of one compound should look alike. Small variations are normal; large unexplained swings are not.
Compare across compounds
Different peptides elute at different times and ionize differently, so judge each against its own expected behavior.
Compare across suppliers
Place our reports beside any other supplier’s. The one that shows more evidence is easier to trust.
Why independent testing sits at the center
Our certificates come from independent laboratories, not from the group that supplies the vial. That separation is deliberate. It makes the result harder to bend and easier to compare, and it lets us say plainly that we do not grade our own work.
We describe the principles behind this in Setting the Standard at Synagenics, and the full set of tests, from endotoxin to counter-ion analysis, is explained in the Research Peptide Quality, Testing and COA Guide.
What we do not do from the lab
- We do not make claims about effects in people or animals.
- We do not publish a result without the data behind it.
- We do not present one certificate as if it covered every lot.
- We do not sell our products for anything other than laboratory research.
For the compounds we document in depth, read the GHK-Cu, Epitalon and Semax guides, or start with the Cellular Research Hub.
Questions researchers ask us most
- Can you send the raw data file? Ask at support@synagenics.com with the lot number and we will tell you what is available.
- Do you report net peptide content? Where it is measured, it appears on the report. Ask if you need it for a specific lot.
- Can I get endotoxin results? Cell-based work benefits from them. Contact us with the compound and lot.
- Is the lab named on the report? The testing facility is identified on the certificate itself.
We answer these questions directly because documentation is the whole point.
How research peptides are made, in general terms
Understanding where impurities come from makes certificates easier to read. Most research peptides are built by solid-phase peptide synthesis, a method for which Bruce Merrifield received the Nobel Prize in Chemistry in 1984.
- Assembly. Amino acids are added one at a time to a chain anchored on a resin bead. Each addition is a chemical reaction that is never perfectly complete.
- Cleavage. The finished chain is released from the resin and its protecting groups are removed, usually with a strong acid.
- Purification. Preparative HPLC separates the target peptide from deletion sequences, truncated chains and other by-products.
- Freeze-drying. Pure fractions are lyophilized to a stable solid powder.
- Analysis. Analytical HPLC and mass spectrometry confirm purity and identity.
Every stage can leave a trace, which is why purity and identity data matter.
Additional analyses you can ask for
Core HPLC and mass spectrometry cover purity and identity. Some applications need more.
| Net peptide content | Needed to calculate accurate stock concentrations, because powder weight includes counter-ion and water. |
|---|---|
| Endotoxin | Important for cell-based assays where bacterial contaminants distort results. |
| Sterility | Relevant for long cultures that cannot tolerate microbial contamination. |
| Counter-ion form | Useful when trifluoroacetate could affect a cell assay. |
Email support@synagenics.com with the compound and lot number and we will tell you what is available.
Glossary for reading our certificates
A short reference for the terms that appear on a Synagenics report.
| Lyophilized | Freeze-dried to a stable powder. |
|---|---|
| Retention time | How long a compound takes to leave the HPLC column. |
| Main peak | The peak representing the target peptide in the chromatogram. |
| Impurity peak | A smaller peak from a related species such as a deletion sequence. |
| m/z | Mass-to-charge ratio, the quantity a mass spectrometer measures. |
| Theoretical mass | The mass calculated from the sequence, used as the reference. |
| Lot | A single production run of a compound. |
| RUO | Research use only. |
Worked example: reading a certificate from top to bottom
Here is how an experienced reader works through a report, whichever compound it covers.
- Header. Confirm the compound name, lot number and test date. These must match your vial.
- Method block. Note the instrument, column, mobile phases, gradient and detection wavelength. A report that omits them cannot be reproduced.
- Chromatogram. Find the tallest peak and check its retention time against the method. Scan for neighbors, shoulders and baseline drift.
- Integration table. Look at the peak areas. The purity value should equal the main-peak area divided by the total. Check that small peaks were integrated, not ignored.
- Mass spectrum. Locate the observed mass and compare it with the theoretical value. For a peptide with several charge states, the deconvoluted mass should agree with each.
- Signature and laboratory. Confirm that the report names the facility that produced it.
If every step checks out, the certificate has told you what you need to know. If any step is missing, ask for it before you rely on the material.
Key takeaways from our lab
- A certificate is evidence only if it shows the chromatogram, the mass spectrum and the lot number.
- Purity tells you how clean the main peak is; mass spectrometry tells you what the peak is.
- Independent testing keeps the people who sell a vial separate from the people who grade it.
- Public certificates let you compare lots, compounds and suppliers on equal terms.
- Ask for anything a report leaves out, such as net peptide content or endotoxin results, before you rely on a lot.
From Our Lab FAQ
What does a Synagenics certificate of analysis include?
The compound name, lot number, HPLC chromatogram and purity value, mass spectrum and observed mass, test date and the independent laboratory that produced the data.
Where can I read the certificates?
In the public COA library at synagenics.com/coas/, searchable by compound or lot number, with no account required.
Who performs the testing?
Independent third-party laboratories test each lot, and the facility is identified on the certificate.
How do I know the report matches my vial?
Compare the compound name and lot number on the vial label with those on the report. If they differ, contact support@synagenics.com.
Are Synagenics products for human or animal use?
No. They are research-use-only materials for qualified laboratory work.
How do I read an HPLC chromatogram?
Look for one dominant, symmetrical peak on a flat baseline, check the stated method and treat clusters of peaks near the main one as a question to ask.
Related research
Continue exploring the Synagenics research library.
Read the data for yourself
Open the public COA library and review any lot before you order.
For qualified laboratory research use only. Not for human or animal use. These statements have not been evaluated by the US Food and Drug Administration.