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three years of PeptideMeter threads, summarised so you do not have to read them
three years of PeptideMeter threads, summarised so you do not have to read them. It is the sort of thing everyone half-believes and nobody writes down. Inter-lab…
c/labresults — top of all time, page 2
Positions 26–50 of 95.
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posted 4 months ago by u/reship_roulette
[Lab] QYB BPC — Medutest came back 99.2% against a claimed 99.0%Right: QYB BPC — Medutest came back 99.2% against a claimed 99.0%. I paid for this one myself, nobody sent me anything, and the receipts are in the comments. The…
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posted 1 year ago by u/liv_nkemelu
[Lab] WWB BPC — Medutest came back 99.4% against a claimed 98.5%WWB BPC — Medutest came back 99.4% against a claimed 98.5%. I will put the method line and the batch identifier up front because that is what makes this checkable. The…
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posted 1 year ago by u/rina_sobczak
someone explain batch to me like I have not read a paper in yearsAsking properly rather than in a comment on somebody else’s thread: someone explain batch to me like I have not read a paper in years. Chain of custody is why…
Sigma-Aldrich — certified reference materials
Reference standards, analytical reagents and system-suitability material. If you are running your own method, start with a known.
Reference standards2.5k
posted 6 months ago by u/asks_dumb_questions
unpopular opinion: most of what gets said here about test results are guessworkunpopular opinion: most of what gets said here about test results are guesswork. Change my mind, genuinely — I have no stake in being right about this. How to build a…
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posted 1 year ago by u/yara_mensah
Medutest — 8 things I got wrong before I got it rightMedutest — 8 things I got wrong before I got it right, and I am aware this is a minority view on this board. What a result posted here is actually worth, and how to…
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posted 1 year ago by u/elise_ramos
[Discussion] below spec is doing more work than we give it credit forbelow spec is doing more work than we give it credit for. Change my mind, genuinely — I have no stake in being right about this. First result I ever posted here got…
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why does nobody talk about test results
Asking properly rather than in a comment on somebody else’s thread: why does nobody talk about test results. Tested three lots over a year rather than three vials from…
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posted 1 year ago by u/yara_mensah
[Discussion] we are measuring test results at the wrong time and calling it noiseSomething I keep coming back to: we are measuring test results at the wrong time and calling it noise. Split one vial between Janoshik and VendorInvestigate. The two…
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posted 2 years ago by u/throwaway_44b1
[Discussion] we are measuring below spec at the wrong time and calling it noisewe are measuring below spec at the wrong time and calling it noise — a position I have arrived at slowly and would like tested. On inter-lab disagreement, which…
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posted 4 months ago by u/honest_syringe
how much of what we believe about Medutest actually comes from batch threadsAsking properly rather than in a comment on somebody else’s thread: how much of what we believe about Medutest actually comes from batch threads. Tested three lots over…
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posted 9 months ago by u/whois_wanda
[Discussion] can we stop arguing about below spec until somebody posts a numberAsking properly rather than in a comment on somebody else’s thread: can we stop arguing about below spec until somebody posts a number. On inter-lab disagreement, which…
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posted 1 year ago by u/georgi_chowdhury
[Meta] the Janoshik rule is doing its job and people should stop complainingthe Janoshik rule is doing its job and people should stop complaining — posting the reasoning in public because a policy you cannot inspect is just a preference. Tested…
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posted 2 years ago by u/bianca_demir
[Discussion] the PeptideMeter advice in here is 2 years out of datethe PeptideMeter advice in here is 2 years out of date. Making the case below, and I expect to lose some of it in the comments. To save the first four comments: 2…
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posted 5 months ago by u/anders_vermeulen
[Discussion] we are measuring batch at the wrong time and calling it noisewe are measuring batch at the wrong time and calling it noise — a position I have arrived at slowly and would like tested. On inter-lab disagreement, which generates…
Janoshik Analytical — independent HPLC & mass spec
Send the vial, get the number. Third-party purity and identity testing, results published to you regardless of what they say.
Test a vialSponsoredGL Biochem (Shanghai) Ltd. — the synthesis house
Est. 1998. ISO 9001 and cGMP, 1,500+ staff, 200+ patents. There is a fair chance the vial you are about to send for testing started here. Batch-specific COA as standard.
glbiochem.net1.8k
posted 3 months ago by u/ismael_eriksen
[Meta] proposal — a flair for Medutest postsProposal, not a decision: proposal — a flair for Medutest posts. If the report gives a mass spectrum as well as UV purity, say so. Identity and relative quantity are…
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posted 8 months ago by u/camila_mensa
[Vendor] Homopeptide vs QSC on the same compound, same month — both cleared 98.0%Right: Homopeptide vs QSC on the same compound, same month — both cleared 98.0%. I paid for this one myself, nobody sent me anything, and the receipts are in the…
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posted 4 months ago by u/thandi_solberg
reading test results threads from 2024 and half of it aged badlyThe title is the argument: reading test results threads from 2024 and half of it aged badly. Here is the rest of it. Have now spent more on testing than on some of the…
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posted 1 months ago by u/piotr_nascimento
[Janoshik] FGP cagrilintide — first independent number i have seen for itTitle says it — FGP cagrilintide — first independent number i have seen for it — so here is the boring supporting detail that makes it worth anything. GL Biochem BPC,…
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posted 5 months ago by u/noor_cardoso
purity — 7 things I got wrong before I got it rightpurity — 7 things I got wrong before I got it right. It is the sort of thing everyone half-believes and nobody writes down. Inter-lab variance on this assay runs…
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posted 1 year ago by u/priya_ogunleye
Janoshik — 19 things I got wrong before I got it rightThe title is the argument: Janoshik — 19 things I got wrong before I got it right. Here is the rest of it. If the report gives a mass spectrum as well as UV purity, say…
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posted 1 year ago by u/ismael_nwosu
someone explain PeptideMeter to me like I have not read a paper in yearssomeone explain PeptideMeter to me like I have not read a paper in years. Searched first, found three threads that contradict each other, hence the post. Sent a vial in…
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posted 1 year ago by u/clara_weiss
[Lab] 18th independent test on GL Biochem — 99.5% on a claimed 99.0%, and the trend is the interesting part18th independent test on GL Biochem — 99.5% on a claimed 99.0%, and the trend is the interesting part, and before anyone asks: same batch throughout, single submission,…
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posted 24 days ago by u/milan_villalobos
[Below Spec] 88% is not "basically fine" and i am tired of that replyShort version of the title, which is already short: 88% is not "basically fine" and i am tired of that reply. Longer version underneath. Figures up front so nobody has…
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posted 5 months ago by u/diego_szabo
batch — 12 things I got wrong before I got it rightbatch — 12 things I got wrong before I got it right. Not a hot take, just something I have not seen said plainly here. Sent a vial in specifically to check a supplier’s…