u/dead_space_doug
Needle hub dead space eats 2–5 units per draw. Budget for it.
member · joined 9 Apr 2024
Comments — page 3 of 5
comment on unpopular opinion: chromatogram is massively overrated in c/hplc · 19 points · 4 months ago
related substances are where the story lives, not the main peak
comment on someone explain HPLC to me like I have not read a paper in years in c/hplc · 4 points · 4 months ago
Ran the same vial on two columns, different purity, both right, different separation.
Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.
comment on someone explain HPLC to me like I have not read a paper in years in c/hplc · 1 points · 4 months ago
instrument quality is less important than analyst consistency
comment on reading purity threads from 2024 and half of it aged badly in c/hplc · 182 points · 5 months ago
chromatogram or it did not happen
comment on [Lab] SGN BPC — VendorInvestigate came back 93.7% against a claimed 94.2% in c/coa · 200 points · 6 months ago
purity and net content are two different numbers, same vial
comment on [Discussion] we are measuring waist at the wrong time and calling it noise in c/dosinglogs · 1 points · 7 months ago
consistency is harder than the dose change
comment on my TSH moved and I cannot work out whether area percent is why in c/coa · 0 points · 7 months ago
Not convinced. The evidence does not support that reading.
comment on the semaglutide question that gets asked weekly, answered properly in c/semaglutide · 1 points · 7 months ago
Small correction: the trial was 17 weeks, not 27. Does not change your point but people will quote it.
comment on [Question] New Zealand — has anyone got a straight answer on LC-MS in c/hplc · 0 points · 7 months ago
Mechanistically the bit that matters is purity. It explains most of the early profile and a decent chunk of the outcome.
comment on [Lab] 24th independent test on QSC, and the trend is the interesting part in c/hplc · 79 points · 8 months ago
This is the "correlation is mechanism" thing again. You changed three variables at once.
comment on anyone else notice escrow kicking in around week 75 in c/cryptopay · 1 points · 8 months ago
confirmations are network, the exchange rate at 24 blocks is the deal
Disagree on that part. 99.0% and 98.9% on the same vial is normal.
comment on anyone else notice escrow kicking in around week 75 in c/cryptopay · 2 points · 8 months ago
Sceptical. If this were true we would see it reflected in the data and we do not.
comment on tracking: the version I wish someone had shown me in week 1 in c/dosinglogs · 26 points · 8 months ago
This is correct. Long-term logs matter.
comment on semaglutide — my 2-week log, condensed into one table in c/semaglutide · 102 points · 9 months ago
pens are overpriced, research vials are research grade, same molecule different price
Yes, exactly this, and it is the bit that took me 21 weeks to accept.
comment on semaglutide — my 2-week log, condensed into one table in c/semaglutide · 160 points · 9 months ago
Maintenance for 6 months now. Weight moves within about 3kg and the dose is a quarter of what it peaked at.
comment on semaglutide — my 2-week log, condensed into one table in c/semaglutide · 102 points · 9 months ago
My version: I was so worried about the injection that I put it off for eleven days. The injection is the easiest part. Nobody believes that until they do it.
comment on 15 months in and purity is still the thing I get wrong in c/hplc · 28 points · 9 months ago
Detection wavelength? chromatogram and that changes at different wavelengths.
comment on reading Wegovy threads from 2024 and half of it aged badly in c/semaglutide · 25 points · 9 months ago
comment on the Netherlands: dose history, and what it actually costs here in c/dosinglogs · 5 points · 10 months ago
Came off after 63 weeks for financial reasons. Regained about a third over the following year. Back on now at a much lower dose.
comment on the Netherlands: dose history, and what it actually costs here in c/dosinglogs · 9 points · 10 months ago
Canada here. Waited 17 months on a list, gave up, went private, and the total cost was roughly what I expected.