Testing
Seven tests. Each answers one question.
Start from the claim being made, not the label it carries. Every service states what it establishes and what it does not, so a result is never mistaken for more than it is.
Peptide analysis
Potency (concentration)
What is the concentration of peptide in the vial, checked against the label claim?
Does not establish: Mass confirmation of the peptide's identity, or purity.
- Method
- HPLC-DAD
- Turnaround
- 2 to 3 days. Instrument run time is 26 minutes. Same day is possible; 2 to 3 days is typical, depending on sample volume at the laboratory.
Purity
What is the purity of the peptide in the vial, checked against the label claim?
Does not establish: Peptide identification.
- Method
- HPLC-DAD
- Turnaround
- 2 to 3 days. Instrument run time is 26 minutes. Same day is possible; 2 to 3 days is typical, depending on sample volume at the laboratory.
Mass Confirmation
Is the peptide what the product states it is?
Does not establish: Purity, or concentration.
- Method
- HPLC-MS
- Turnaround
- 2 to 3 days. Instrument run time is 26 minutes. Same day is possible; 2 to 3 days is typical, depending on sample volume at the laboratory.
Contamination screening
Endotoxins
Are endotoxins present in the sample?
Does not establish: Anything about the peptide itself. The quantity of endotoxin: the result is presence or absence only, a presence screen rather than a quantitation.
- Method
- LAL assay
- Turnaround
- Up to 1 day. A rapid kit result takes under an hour. The plate reader method typically takes 1 day.
Sterility
Is the product free from bacterial contamination?
Does not establish: Anything about the peptide itself.
- Method
- Direct inoculation, USP <71>
- Turnaround
- 14 days. Traditional method per USP <71>. A rapid method on the BacT/ALERT system, with a 7 day turnaround, is planned but not yet offered.
Product properties
Metals
What heavy metal concentrations are present in the product?
Does not establish: Anything about the peptide itself.
- Method
- ICP-MS or ICP-OES
- Turnaround
- Run time is several minutes. Same day is possible.
pH
What is the pH of the product?
Does not establish: Anything about the peptide itself.
- Method
- pH meter
- Turnaround
- Immediate.
Packages
Potency, Purity, and Mass Confirmation
All three run from a single injection on the HPLC-MS and share one 10mg sample. The laboratory's usual package.
- Potency (concentration)
- Purity
- Mass Confirmation
Full Panel
All seven tests.
- Potency (concentration)
- Purity
- Mass Confirmation
- Endotoxins
- Sterility
- Metals
- pH
Turnaround is an estimate in days, not a promise. Turnaround is measured from sample receipt, not from payment. Prices are published per sample on the pricing page.