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help me understand method development, I have read the wiki twice
Asking properly rather than in a comment on somebody else’s thread: help me understand method development, I have read the wiki twice. A shoulder that does not…
u/teodor_szabo
Contributes reviews on supplier material. Based in Lyon.
member · joined 13 Apr 2025
17,397post karma
7,712comment karma
5submissions
98comments
Overview — page 3 of 3
comment on method development — 10 things I got wrong before I got it right in c/hplc · 29 points · 1 year ago
Agreed, and it is why HJ printing the column and gradient on the certificate is genuinely useful rather than decorative.
comment on reading chromatogram threads from 2024 and half of it aged badly in c/hplc · 124 points · 1 year ago
Started reporting my own integrations with the baseline choice stated. Arguments in my threads dropped by about half.
comment on genuine question about weekly update that I am slightly embarrassed to ask in c/dosinglogs · 10 points · 1 year ago
Disagree with daily weighing. You are logging fluid, and the emotional cost is real for very little information.
comment on [Discussion] we are measuring carrier at the wrong time and calling it noise in c/intlshipping · 122 points · 1 year ago
That is the quoted lead time, not the observed transit. Both belong in the report and they are different columns.
comment on how much of what we believe about gradient actually comes from purity threads in c/hplc · 155 points · 1 year ago
integration decisions move the number more than the sample does
comment on help me understand lane, I have read the wiki twice in c/intlshipping · 140 points · 1 year ago
Not convinced by four data points. That is not a lane yet, it is an anecdote with a route attached.
comment on [Lab] 24th independent test on CPC — 97.6% on a claimed 97.0%, and the trend is the interesting part in c/hplc · 12 points · 2 years ago
Area percent is the integrated area of your peak over the total integrated area at one wavelength on one gradient. Change any of those and the number changes without the sample changing.
comment on help me understand method development, I have read the wiki twice in c/hplc · 189 points · 2 years ago
report the method or do not report the number
comment on help me understand pentadecapeptide, I have read the wiki twice in c/bpc157 · 32 points · 2 years ago
Not convinced. A high purity figure with no identity confirmation tells you the sample is homogeneous, not that it is what you ordered.
comment on why does nobody talk about waist in c/dosinglogs · -8 points · 2 years ago
a log is not a plan and it is not advice for anybody else
comment on method development is the most under-discussed thing on this board in c/hplc · 1 points · 2 years ago
Agreed. Two analysts, one trace, two integration choices, and a spread that has nothing to do with the vial.
comment on am I the only one who found Zepbound harder than the injections in c/tirzepatide · 11 points · 2 years ago
week 3 is early to draw any conclusion at all
comment on why does nobody talk about MASH in c/survodutide · 24 points · 2 years ago
Biopsy-confirmed population or imaging-selected?
comment on why does nobody talk about MASH in c/survodutide · 37 points · 2 years ago
Has anyone posted an independent purity result for this compound?
comment on someone explain pentadecapeptide to me like I have not read a paper in years in c/bpc157 · 8 points · 2 years ago
Push back: "no reported harms" in a literature with almost no human trials is not a safety finding.
comment on tirzepatide: the version I wish someone had shown me in week 1 in c/tirzepatide · 29 points · 2 years ago
Small fix: SURMOUNT is the obesity programme, SURPASS is the type-2 programme.
Saving this one. It is the clearest statement of the stall problem I have read here.
comment on [Lab] KP cagri — VendorInvestigate came back 98.1% against a claimed 97.5% in c/hplc · 129 points · 2 years ago
system suitability before you believe any number on the run
comment on [Lab] split one vial across Medutest and Janoshik — 98.3% and 98.7% in c/tirzepatide · 112 points · 2 years ago
13kg over 61 weeks, never went past 10mg, and muscle cramps stayed mild the whole way. Posting because the loud threads are all 15mg.
comment on [Question] 15mg — what am I missing here in c/tirzepatide · 242 points · 2 years ago
That percentage is body weight change, not body fat. Different measurement, and the distinction gets lost every time.
comment on [Question] tirzepatide — what am I missing here in c/tirzepatide · 0 points · 2 years ago
the four-week step schedule is the label, not folklore
comment on [Discussion] can we stop arguing about HPLC until somebody posts a number in c/hplc · 16 points · 2 years ago
integration decisions move the number more than the sample does
comment on [Discussion] we are measuring GIP at the wrong time and calling it noise in c/tirzepatide · 89 points · 2 years ago
hold the dose that works, the ladder is not a leaderboard