u/cormac_roos
Contributes reviews on supplier material. Based in Lagos.
member · joined 12 Mar 2025
Overview — page 3 of 3
comment on unpopular opinion: most of what gets said here about integration is guesswork in c/hplc · 1 points · 1 year ago
Ran a blank after a high-concentration injection and found the carryover I had been calling an impurity.
comment on genuine question about HPLC that I am slightly embarrassed to ask in c/hplc · -14 points · 1 year ago
the column has a history and it shows in the peak shape
comment on tried sequence for 4 weeks. here is what happened. in c/bpc157 · 362 points · 1 year ago
regulatory status varies by jurisdiction and it has moved recently
comment on reading chromatogram threads from 2024 and half of it aged badly in c/hplc · 106 points · 1 year ago
System suitability — repeat injections, tailing factor, plate count, RSD on area — is what tells you the instrument was fit for the measurement that day. Without it, the purity figure is unanchored.
comment on [Lab] 14th independent test on WWB — 99.6% on a claimed 99.0%, and the trend is the interesting part in c/hplc · 1 points · 2 years ago
ghost peak, check the plumbing first, it is always the plumbing
comment on nobody warned me about reflux and I would have liked the warning in c/bloodwork · 48 points · 2 years ago
Small fix — a reference interval is not a treatment target, and the post above uses them interchangeably.
comment on [Lab] 16th independent test on ERP — 97.4% on a claimed 97.0%, and the trend is the interesting part in c/hplc · 28 points · 2 years ago
Do you have the mass, or only the UV trace?
comment on [Results] 26 weeks, 5kg, and dose escalation was the hard part in c/retatrutide · 117 points · 2 years ago
Independent purity testing on this compound is thin compared with the older molecules, simply because fewer members have paid for it. Fewer results means wider uncertainty, not a verdict.
comment on [Results] 26 weeks, 5kg, and dose escalation was the hard part in c/retatrutide · 1 points · 2 years ago
Are you tracking heart rate at all?
comment on switched from 10mg to 15mg and nausea got better, not worse in c/retatrutide · 72 points · 2 years ago
research-use-only material is not approved for human use, full stop
comment on purity — 19 things I got wrong before I got it right in c/hplc · 64 points · 2 years ago
Retention time shifted 0.4 minutes and I assumed the worst. It was the column temperature.
comment on unpopular opinion: most of what gets said here about glucagon is guesswork in c/retatrutide · 1 points · 2 years ago
Push back: quoting the phase 2 headline as an expected outcome is not a fair reading of a small trial with wide intervals.
comment on does chromatogram actually matter or is it forum lore at this point in c/hplc · 612 points · 2 years ago
report the method or do not report the number
comment on anyone else notice dose escalation kicking in around week 37 in c/retatrutide · 72 points · 2 years ago
What is the source for that figure — the published paper or a summary of it?
This is the sentence the rest of the board should read first. Phase 2 is not a label.