helena_vidmar
Asking the questions I could not find answers to in 2024.
8.5kreputation
22answers
3accepted
19questions
0·2·7badges g·s·b
51tags
97Is a 97.6% result from VendorInvestigate comparable to 96.4% from Janoshik?accepted · answered 4 Oct 2025 · purity, batch-testing, reference-standard88If the mass spec matches exactly, why is that not proof the vial is pure?accepted · answered 5 Feb 2025 · mass-spec, purity, coa64How does cagrilintide behave on a C8 column compared to mazdutide?accepted · answered 12 Sept 2025 · hplc, purity, reference-standard35How do I compute the +3 charge state m/z for a peptide of 4813.5 Da?answered 6 May 2024 · mass-spec, dosing-math, purity33Has anyone independently verified an SSA semaglutide batch COA?answered 10 Feb 2025 · vendor-vetting, coa, batch-testing29Is 99.1% a realistic purity ceiling for survodutide given its chain length?answered 2 Jul 2026 · purity, hplc, peptide-mapping25What does 96.8% purity on a C4 column actually tell me about an orforglipron vial?answered 3 Oct 2024 · hplc, purity, coa23How many vials from a QSC lot should I send for peptide mapping?answered 29 Oct 2025 · batch-testing, coa, cost-analysis22Would you accept 97.6% on orforglipron from QYB without a content assay?answered 17 Jan 2025 · purity, content-assay, vendor-vetting19What does the mechanism of semaglutide predict that STEP 2 did not test?answered 28 Feb 2026 · glp1-mechanism, clinical-trials, gip-receptor16How does reference-standard error propagate into a GLP-1 receptor agonist content figure?answered 2 Dec 2025 · reference-standard, content-assay, purity14Is a 98.4% result from PeptideMeter comparable to 98.2% from Medutest?answered 23 Jun 2026 · purity, batch-testing, reference-standard13Is a 97.1% result from VendorInvestigate comparable to 95.2% from PeptideMeter?answered 14 Jun 2026 · purity, batch-testing, reference-standard12How do I check that two KP lots of retatrutide agree on content assay?answered 18 Mar 2025 · batch-testing, content-assay, vendor-vetting10How do I tell reflux from an energy deficit on 1,000 kcal a day?answered 19 Jul 2026 · fatigue, nutrition, electrolytes9Why does an order sit "pending" after the transfer confirmed, and what records should I keep?answered 22 Jul 2026 · payment-privacy, vendor-vetting, harm-reduction8Is 98.4% a realistic purity ceiling for a GLP-1 receptor agonist given its chain length?answered 26 Dec 2025 · purity, hplc, peptide-mapping8Is SURMOUNT-2 a fair comparison of tirzepatide against its comparator arm?answered 13 Mar 2025 · clinical-trials, semaglutide, tirzepatide5How do I compare Homopeptide and GL Biochem on lead time to Singapore?answered 4 Sept 2025 · vendor-comparison, international-shipping, cold-chain3Is 97.9% a realistic purity ceiling for survodutide given its chain length?answered 10 Jan 2025 · purity, hplc, peptide-mapping3Is a 97.6% result from PeptideMeter comparable to 98.8% from Medutest?answered 5 Sept 2024 · purity, batch-testing, reference-standard2Is 214 nm or 280 nm the right detection wavelength for a purity number?answered 30 Jan 2026 · hplc, purity, coa