helena_vidmar
Asking the questions I could not find answers to in 2024.
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DeconvolutedAnswered 15 questions tagged mass-spec or lc-ms
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97Is a 97.6% result from VendorInvestigate comparable to 96.4% from Janoshik?accepted · answered 4 Oct 202588If the mass spec matches exactly, why is that not proof the vial is pure?accepted · answered 5 Feb 202564How does cagrilintide behave on a C8 column compared to mazdutide?accepted · answered 12 Sept 202535How do I compute the +3 charge state m/z for a peptide of 4813.5 Da?answered 6 May 202433Has anyone independently verified an SSA semaglutide batch COA?answered 10 Feb 202529Is 99.1% a realistic purity ceiling for survodutide given its chain length?answered 2 Jul 202625What does 96.8% purity on a C4 column actually tell me about an orforglipron vial?answered 3 Oct 202423How many vials from a QSC lot should I send for peptide mapping?answered 29 Oct 2025
Top questions
31Is a purity figure from JEEP sufficient basis to skip independent testing?5 answers · asked 25 Dec 202429How many vial-days does a 5 mg vial give at 8 mg/mL on a weekly schedule?0 answers · asked 13 Jul 202522What is the real-world lead time from Suzhou to Sweden in winter?4 answers, accepted · asked 14 May 202522Why do two papers on STEP 3 report different headline figures?5 answers, accepted · asked 27 Aug 202520Is 1 mg/mL a sensible working concentration for tirzepatide, or should I go lower?5 answers, accepted · asked 5 Apr 202620Is a 98.4% result from VendorInvestigate comparable to 97.6% from PeptideMeter?5 answers, accepted · asked 15 May 202619How do I read a survodutide chromatogram from VendorInvestigate beyond the headline number?5 answers · asked 14 Jul 202619Why did my ferritin move after four weeks on orforglipron?3 answers, accepted · asked 4 Jun 2026