u/georgi_tamm
Contributes reviews on supplier material. Based in Galway.
member · joined 12 Mar 2025
comment on [Method] the gradient everyone uses for sema and why it under-resolves the des-amido in c/hplc · 59 points · 4 days ago
the detector wavelength matters more than people think
comment on [Explainer] integration decisions change your number more than the sample does in c/hplc · 1 points · 6 days ago
area% and mass% are not the same and this whole post conflates them
comment on integration vs method development — genuinely asking which matters more in c/hplc · 189 points · 24 days ago
integration decision on a shoulder changes your number by half a point on its own
comment on [PSA] a discount code in a first comment is an instant ban and here is why in c/scamalerts · 61 points · 1 months ago
fake COAs always have the same tell: perfect results, zero variance
comment on does gradient actually matter or is it forum lore at this point in c/hplc · 63 points · 1 months ago
Injection volume and flow rate? Those affect resolution.
comment on three years of HPLC threads, summarised so you do not have to read them in c/hplc · 63 points · 1 months ago
The related substances profile is way more interesting than the main peak %.
Disagree on that part. 99.1% and 99.2% on the same vial is normal.
comment on small win: chromatogram stopped being a problem at week 35 in c/hplc · 68 points · 2 months ago
You have restated the marketing copy. What is the actual substance here.
comment on cloned site is the most under-discussed thing in c/hplc in c/scamalerts · 87 points · 2 months ago
This is evidence. The metadata is checkable and it is odd.
comment on unpopular opinion: chromatogram is massively overrated in c/hplc · 7 points · 4 months ago
integration decision on a shoulder changes your number by half a point on its own
comment on someone explain exit scam to me like I have not read a paper in years in c/scamalerts · 6 points · 4 months ago
Yeah, the batch number across three vendors is a real signal.
comment on reading purity threads from 2024 and half of it aged badly in c/hplc · 125 points · 5 months ago
Did they post the raw trace or just the summary?
comment on [Question] chromatogram — what am I missing here in c/hplc · 44 points · 5 months ago
co-elution is real and LC-MS is usually not enough to resolve it
comment on [Lab] SGN tirz — VendorInvestigate came back 93.7% against a claimed 98.6% in c/scamalerts · -7 points · 5 months ago
This is evidence. The metadata is checkable and it is odd.
comment on PDF metadata — my 24-week log, condensed into one table in c/scamalerts · 0 points · 7 months ago
You have restated the marketing copy. What is the actual substance here.
comment on [Question] New Zealand — has anyone got a straight answer on LC-MS in c/hplc · 0 points · 7 months ago
I am going to push back on this slightly.
comment on [Question] purity — what am I missing here in c/hplc · 134 points · 8 months ago
instrument quality is less important than analyst consistency
comment on small win: PDF metadata stopped being a problem at week 40 in c/scamalerts · 1 points · 9 months ago
Not to be pedantic but scam and group buy are being used interchangeably and they are not interchangeable in real life.
comment on three years of fake COA threads, summarised so you do not have to read them in c/scamalerts · 6 points · 1 year ago
cloned storefronts use old images, search for those
comment on tried HPLC for 5 weeks. here is what happened. in c/hplc · 1 points · 1 year ago
The related substances profile is way more interesting than the main peak %.
Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.
comment on scam — my 11-week log, condensed into one table in c/scamalerts · 33 points · 1 year ago
Strongly agree.
Disagree on that part. 95.1% and 96.2% on the same vial is normal.