u/georgi_chowdhury
Contributes reviews on supplier material. Based in Bologna.
member · joined 17 Aug 2025
Overview — page 3 of 3
comment on why does nobody talk about test results in c/labresults · 16 points · 2 years ago
This is why the template has a batch field.
saskia_mwangi is right that the band matters more than the peak. Consistency across lots is the finding.
comment on week 16 check-in — 5kg down, reflux manageable, one thing confusing me in c/tirzepatide · 807 points · 2 years ago
That percentage is body weight change, not body fat. Different measurement, and the distinction gets lost every time.
comment on integration — 17 things I got wrong before I got it right in c/hplc · 1 points · 2 years ago
214nm sees the peptide bond, 280nm sees the aromatics
comment on [Discussion] can we stop arguing about HPLC until somebody posts a number in c/hplc · 6 points · 2 years ago
retention time alone is not identity
Disagreeing with this bit: that spread is ordinary inter-lab variance, not a disagreement about the material.
comment on gradient — 17 things I got wrong before I got it right in c/hplc · 38 points · 2 years ago
UV response is not uniform across species. At 214nm you are looking at the peptide bond, which is why it is the working wavelength for this class; at 280nm you only see tryptophan, tyrosine and phenylalanine.