Hello GLP FAQ Community!
At Recherche Logistique, we believe understanding laboratory test results is just as important as having access to them.
One question worth discussing is what a peptide purity result of 99% or higher actually tells you.
Purity Testing (HPLC)
HPLC testing measures the relative amounts of substances detected under a particular analytical method. A reported purity of 99% does not automatically mean that 99% of the vial’s total weight is the intended peptide.
Identity Testing (Mass Spectrometry)
Identity testing helps confirm that the tested material matches the expected peptide. Purity and identity are separate measurements, and both matter.
What Else Should Researchers Look For?
When reviewing a Certificate of Analysis (COA), consider:
It’s also important to recognize that purity testing alone does not establish sterility or endotoxin levels. Those require additional testing.
Our Commitment
Recherche Logistique is a Canadian, veteran-owned research peptide supplier. We believe in transparency, analytical documentation, and giving researchers access to information about the materials they purchase.
Our products are strictly for laboratory research use only and are not intended for human or veterinary use.
We’d love to hear from the community:
When reviewing a peptide COA, what information do you consider most important?
https://recherchelogistique.ca
Recherche Logistique Team
At Recherche Logistique, we believe understanding laboratory test results is just as important as having access to them.
One question worth discussing is what a peptide purity result of 99% or higher actually tells you.
Purity Testing (HPLC)HPLC testing measures the relative amounts of substances detected under a particular analytical method. A reported purity of 99% does not automatically mean that 99% of the vial’s total weight is the intended peptide.
Identity Testing (Mass Spectrometry)Identity testing helps confirm that the tested material matches the expected peptide. Purity and identity are separate measurements, and both matter.
What Else Should Researchers Look For?When reviewing a Certificate of Analysis (COA), consider:
- Does the report identify the specific batch?
- Was testing performed by an independent laboratory?
- Does it include both purity and identity results?
- Is there a quantitative content assay?
- Are the testing methods and dates clearly documented?
It’s also important to recognize that purity testing alone does not establish sterility or endotoxin levels. Those require additional testing.
Our CommitmentRecherche Logistique is a Canadian, veteran-owned research peptide supplier. We believe in transparency, analytical documentation, and giving researchers access to information about the materials they purchase.
Our products are strictly for laboratory research use only and are not intended for human or veterinary use.
We’d love to hear from the community:
When reviewing a peptide COA, what information do you consider most important?
https://recherchelogistique.caRecherche Logistique Team