PeptideChemSF said:My HPLC chromatogram analysis for certificates of analysis — I sent my batch to Janoshik and here's what the results showed: Main peak retention time:…
I tested my certificates of analysis batch through Janoshik — 97.0% purity. That's within acceptable range for compounded peptides. Turnaround was 10 business days.
The test costs ~$126 but gives you actual HPLC chromatography data plus mass spec confirmation. For the peace of mind alone, it's worth every penny. I test every new batch from a new vendor.
Following on from PeptideChemSF — and this may be the naive question:
How would you tell the difference between that and the alternative explanation?
bri_stats said:I tested my certificates of analysis batch through Janoshik — 97.0% purity.
COA red flags for certificates of analysis — here's what to look for when reviewing a Certificate of Analysis:
- No HPLC data: If there's no chromatography graph, it's not a real COA
- Exact 100% purity: Suspicious — real testing always shows slight variation
- No batch number: Can't trace back to specific production
- No endotoxin testing: For injectables, this is essential
- Template looks like it was made in Word: Professional labs have standardized formats
I have seen fake COAs that are literally photoshopped. Always verify independently if possible.
PeptideDetective — Independent Peptide Analytics
Community-driven peptide testing and vendor rating platform. Transparent results. Unbiased analysis. Trusted by thousands.
View Resultsbri_stats said:I tested my certificates of analysis batch through Janoshik — 97.0% purity.
True, with the qualification that this is a self-selected group. The people for whom it did not work post less, and that shapes everything we think we know.
bri_stats said:I tested my certificates of analysis batch through Janoshik — 97.0% purity.
Bookmarking. The distinction being drawn above is the one nobody else makes. I will report back once I have actually tried it.