HPLC
High-performance liquid chromatography can show the chromatographic purity of a sample and how the main peak relates to the related components detected.
HPLC purity is not the same as the amount of peptide in the vial.
Certificates & Laboratory Testing
Premium Peptide follows a batch-based documentation approach. The tests actually available are listed for each batch individually. A test is only marked as available when a corresponding laboratory report exists for that batch.
Not every certificate of analysis carries the same weight. What matters is not the number of logos on a PDF, but which sample was examined, which methods were used, which results are actually present, and whether the report can be verified independently.
View batch documentsWhat laboratory tests can show
The following methods describe what an analysis can establish. Listing a method here does not mean that this test has been carried out for any Premium Peptide product.
LC-MS
Mass spectrometry can be used to confirm identity based on the characteristic measured mass or mass signals of the compound.
Peptide Content
A quantitative determination of how much peptide the analysed sample actually contained.
This is the figure that speaks to the declared mg on the label.
Karl Fischer
Determines the water content of the material, which forms part of the total powder weight.
Counterion Analysis
Determines relevant counterions, for example acetate or TFA, where examined.
Residual Solvents
Examines the material for relevant solvent residues remaining from synthesis and work-up.
ICP-MS
Analyses the sample for relevant elemental and heavy-metal impurities.
Sterility
A microbiological sterility test on the material examined.
Endotoxin
Tests for bacterial endotoxins in the sample examined.
Bioburden
Determines the microbial load of the material examined.
Purity vs. quantity
These two figures answer different questions and are frequently confused.
Illustrative example — not a Premium Peptide laboratory result
Purity
99.x % HPLC purity
A relative chromatographic value. It describes how the main peak relates to the other components detected in the sample under the conditions of that method.
Quantity
x.xx mg peptide content
A quantitatively determined mass. It describes how much peptide the analysed sample actually contained.
A high chromatographic purity value on its own does not prove that a vial labelled as 10 mg actually contains 10 mg of peptide. Purity describes a ratio; quantity describes an amount.
More than just 99 % purity
A lyophilised powder is not made up of peptide alone. A broader analytical profile can distinguish between several fractions of the total weight, which is why the following three figures are not interchangeable: total powder weight, peptide content and chromatographic purity.
- Peptides
- The target compound itself.
- Water
- Residual moisture bound in the lyophilised powder.
- Counterion
- For example acetate or TFA, depending on the synthesis and work-up.
- Related substances
- Structurally related components detected alongside the main peak.
- Other measured components
- Anything else quantified by the methods applied.
Levels of testing information
These terms describe different scopes of information, not quality grades. They are explanatory categories, not a statement about what has been tested for any given product.
Basic
may include- HPLC purity
- Identity / LC-MS
Extended
may include- HPLC purity
- LC-MS identity
- Quantitative peptide content
Full QC
may include- Water content
- Counterion
- Residual solvents
- Heavy metals
- Sterility
- Endotoxin
- Bioburden
How to evaluate a laboratory certificate
A professional-looking PDF is not in itself evidence. Evidential weight comes from a traceable sample identity, suitable methods, actual measurement results and, where possible, independent verifiability. The table below rates how traceable and information-dense a report is; it does not claim that every analysis is necessary for every research product.
| Feature | Strong evidence | Limited | Weak evidence |
|---|---|---|---|
| Batch / Lot | ✓Unambiguous lot number links product and report | △Internal number with limited traceability | ×No batch number |
| Laboratory | ✓Independent laboratory clearly identified | △Laboratory named, little further information | ×Shop or manufacturer certificate only |
| Verification | ✓Report checkable with the laboratory via ID, QR or URL | △Laboratory contactable, no direct online verification | ×No independent verification |
| Identity | ✓Suitable identity analysis with a traceable result | △Identity stated, limited measurement information | ×Product name only |
| HPLC purity | ✓Result plus chromatogram and traceable report details | △Percentage with limited supporting data | ×Only 99 %+ pure |
| Peptide quantity | ✓Actual quantitative determination | △Amount stated, basis of measurement unclear | ×Label or nominal amount only |
| Measurement detail | ✓Chromatograms, spectra or comparable traceable data | △Summary of results | ×No measurement information |
| Sterility | ✓Batch-specific test with method and result | △General pass or fail with limited detail | ×Bare claim of sterility |
| Endotoxin | ✓Batch-specific result with method | △Pass or fail with little detail | ×No test, or an unsupported claim |
| Heavy metals | ✓Actual panel with results | △General pass or fail | ×Only heavy-metal tested |
| Water / counterion / solvents | ✓Individually reported results where examined | △Partially examined | ×No extended analyses |
| Date | ✓Analysis or report date clearly stated | △Date with unclear meaning | ×No date |
| Sample ID | ✓Unambiguous laboratory or sample ID | △Internal product number only | ×No sample identification |
| Sampling | ✓Origin and sampling transparently documented | △Seller submitted the sample themselves | ×Origin of the sample unclear |
| Accreditation | ✓Laboratory and relevant scope verifiable | △Laboratory accredited, method scope unclear | ×ISO logo without context |
Five quick checks
- Does the batch match?Compare the lot or batch number on the product with the one on the laboratory report. If they differ, the report does not describe the item in your hand.
- Can the report be verified independently?A genuine laboratory ID, a verification URL or a QR code pointing to the laboratory is stronger than a PDF hosted only by the seller.
- Was purity or also quantity determined?99.x % purity and x.xx mg peptide content answer different questions. One is a ratio, the other an amount.
- Are measurement details present?Chromatograms, spectra, stated methods, a sample ID and actual results make a report traceable. A summary line alone does not.
- What was not tested?An HPLC purity test does not confirm the actual mass in the vial, sterility, endotoxins, heavy metals, water content or residual solvents. Only analyses that were actually carried out may be interpreted.
How a laboratory report is structured
This schematic shows where the relevant information is typically found on a report. It contains no values, no laboratory and no batch.
Illustrative structure — not an actual laboratory report
ProductWhich compound was submitted.
Lot / BatchLinks the report to a specific production batch.
Sample IDThe identifier the laboratory assigned to the sample.
LaboratoryWhich laboratory carried out the analysis.
Analysis dateWhen the sample was analysed.
MethodWhich analytical procedure was used.
HPLC purityThe chromatographic purity result.
LC-MS identityThe identity confirmation based on measured mass.
Peptide contentThe quantitatively determined amount of peptide.
Chromatogram / spectrumThe underlying measurement data.
Verification ID / QRWhere and how the report can be checked with the laboratory.
Warning signs on a certificate of analysis
- A PDF created solely by the shop or manufacturer, with no external source.
- No lot or batch number anywhere on the document.
- No identifiable laboratory.
- No sample ID or laboratory reference.
- No analysis date, or a date whose meaning is unclear.
- No way to verify the report independently.
- Only 99.9 % pure with no traceable measurement information.
- HPLC purity presented as proof of the actual mass in the vial.
- Sterility or freedom from endotoxins asserted while the report contains only HPLC.
- An accreditation logo without a verifiable laboratory or method scope.
- The same report assigned to several different batches.
- The lot number on the product and on the report do not match.
What we consider important in external laboratory reports
- An unambiguous lot or batch number.
- A sample or laboratory ID.
- The analysis date.
- The method used.
- The actual measurement result, not only a verdict.
- A chromatogram or spectrum, where available.
- A clearly identifiable testing laboratory.
- A direct way to verify the report with that laboratory, where offered.
- A QR code or verification ID, where present.
On ISO/IEC 17025
The accreditation of a laboratory does not automatically mean that every analytical method it offers falls within its accredited scope. What matters is the specific scope: which method, for which matrix, under which standard. An accreditation logo on its own says nothing about the individual test on a report.
The sample is part of the chain of evidence
A laboratory report documents the result for the sample that was examined. If the laboratory did not take or witness the sampling itself, the report alone does not prove that every vial in an entire batch is identical.
Additional forms of assurance can include analysing several vials from the same batch, random sampling, or samples drawn independently of the seller. We do not claim any such procedure for our own batches unless it is documented on this page.
Batch documentation
Reports that actually exist for a specific Premium Peptide batch are listed here, together with the tests carried out for that batch.
No batch-specific laboratory reports have been published yet.
As soon as documents are published for a batch, they will appear here together with the tests actually carried out and, where available, an external means of verification. Until then, this page states the position plainly rather than displaying placeholder documents.
Request documentationFor research purposes only. Not for human consumption.