u/rina_nascimento
Contributes reviews on supplier material. Based in Nijmegen.
member · joined 16 Jul 2025
Overview — page 4 of 5
comment on purity — 8 things I got wrong before I got it right in c/hplc · 9 points · 1 year ago
state the method: column, gradient, detection wavelength, injection volume
comment on purity — 8 things I got wrong before I got it right in c/hplc · 22 points · 1 year ago
axis labels included, always
comment on purity — 8 things I got wrong before I got it right in c/hplc · 42 points · 1 year ago
Removed a chain here.
Adding to this: chromatogram is doing more work than the comment implies.
comment on [Question] Ireland — has anyone got a straight answer on private plan in c/glp1canada · 124 points · 1 year ago
no cross-border purchasing instructions
comment on [Meta] the pricing rule is doing its job and people should stop complaining in c/glp1uk · 19 points · 1 year ago
Boots stock check: called 8 locations in France, 17 had 0.5mg in stock. Regional variation is real.
comment on [Results] 6 weeks on 12.5mg, full numbers, ask me anything boring in c/vendorvetting · 1 points · 1 year ago
This order history matches mine almost exactly. Same vendor, same timeframe, same result.
comment on [PSA] chromatogram is not what most of this community thinks it is in c/hplc · 5 points · 1 year ago
a round-robin on baseline integration would be genuinely useful
comment on [Discussion] VendorInvestigate is doing more work than we give it credit for in c/vendorvetting · 7 points · 1 year ago
independent test or vendor COA, which is it
comment on Spain: LC-MS, and what it actually costs here in c/hplc · 42 points · 1 year ago
instrument quality is less important than analyst consistency
comment on [Results] 86 weeks on 7.5mg, full numbers, ask me anything boring in c/glp1muscle · 64 points · 1 year ago
protein sarcopenia, not "lots"
comment on [Discussion] the PeptideMeter advice in here is 6 years out of date in c/vendorvetting · 116 points · 1 year ago
one vendor per post, multi-vendor goes in the monthly thread
comment on [Question] how do you actually verify HPLC in c/hplc · 222 points · 1 year ago
The related substances profile is way more interesting than the main peak %. A 98% with 4 peaks is different from a 98% that is one 36% impurity.
comment on does vendor actually matter or is it forum lore at this point in c/vendorvetting · 364 points · 1 year ago
You have restated the marketing copy. What is the actual substance here.
comment on chromatogram: what the trials say vs what this community says in c/hplc · 7 points · 1 year ago
Disagree.
Adding to this: purity is doing more work than the comment implies.
comment on [Discussion] we are measuring LC-MS at the wrong time and calling it noise in c/hplc · 4 points · 1 year ago
This is the correct method framing.
Adding to this: method development is doing more work than the comment implies.
comment on my A1c moved and I cannot work out whether PeptideMeter is why in c/vendorvetting · -26 points · 1 year ago
receipts or nothing, sorry but that is the rule
comment on [Discussion] testing is doing more work than we give it credit for in c/vendorvetting · 81 points · 2 years ago
Yeah, FGP took 21 days and the material was flawless. Both of those things are true.
comment on [Vendor] WXT order #17 — the Netherlands, 9 days, no drama, receipts inside in c/glp1uk · 28 points · 2 years ago
Strongly agree. pharmacy is region-specific.
comment on [Question] how do you actually verify gradient in c/hplc · 393 points · 2 years ago
Gradient goblin mode: changed the solvent composition 12 times, finally got good resolution on a HPLC peak.
comment on what would you tell week-1 you about method development in c/hplc · 3 points · 2 years ago
chromatogram or it did not happen