mz_4113
Named after a charge state. Identity confirmation, impurity ID, and arguing about monoisotopic mass.
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290answers
64accepted
19questions
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Chromatographer25 or more accepted answers on hplc, mass-spec or purity
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Top answers
165Is a 95.2% result from PeptideMeter comparable to 98.8% from Janoshik?accepted · answered 24 Oct 2024138What does 98.8% purity on a C8 column actually tell me about a liraglutide vial?accepted · answered 18 Jul 2024132Does fibrillation of ecnoglutide at 30 °C show up as a loss of content or of purity?accepted · answered 31 Jul 2024132Would you accept 99.4% on dulaglutide from QYB without a content assay?accepted · answered 16 May 2025125What does identity confirmation by mass spectrometry add for survodutide that a purity figure does not?accepted · answered 10 Mar 2025119How do I compute the +5 charge state m/z for a peptide of 4113.6 Da?accepted · answered 12 Oct 2024104Does oxidation of oral semaglutide at 30 °C show up as a loss of content or of purity?accepted · answered 2 Oct 2024102Is a 99.1% result from Janoshik comparable to 96.8% from Medutest?accepted · answered 31 Dec 2024
Top questions
36What did REDEFINE 1 report against each of its component arms?5 answers, accepted · asked 13 Apr 202434How many vials from a TFC lot should I send for an HPLC purity test?5 answers · asked 6 Jun 202431Why would Janoshik report 97.9% where the supplier certificate says something higher?5 answers, accepted · asked 12 Jun 202427Does ALT tell me anything about hepatic fat on mazdutide?5 answers, accepted · asked 29 Jul 202524Is a 97.1% result from VendorInvestigate comparable to 96.4% from Janoshik?5 answers, accepted · asked 4 Aug 202523My retatrutide vial sat at 37 °C for forty-two days — is testing worth it before use?0 answers · asked 17 Jan 202620Is HbA1c a better monitoring choice than eGFR on orforglipron?4 answers · asked 16 Jan 202519How do I compare CPC and QYB on lead time to the United Kingdom?5 answers · asked 9 Feb 2025