rhian_prydderch
Engineer. I want a tolerance, not a reassurance.
44kreputation
141answers
20accepted
19questions
0·3·8badges g·s·b
69tags
Badges
Second Opinion25 answers on a question that already had an accepted answer
DeconvolutedAnswered 15 questions tagged mass-spec or lc-ms
QuorumReached 5,000 reputation
Asked WellA question with a score of 10 or more
First AcceptFirst answer marked as accepted
Citation NeededTen answers carrying a published citation
EditorFirst post edit
CommentatorLeft 30 comments
AutobiographerCompleted a profile
Tag WranglerActive in 8 or more distinct tags
Sample SubmittedPosted an independent third-party test result
Top answers
170What is a realistic achievable purity for a 39-residue peptide?accepted · answered 21 Jun 2024145What does a 96.8% purity with a date of analysis attached let me conclude?accepted · answered 18 Aug 2024127Why did my creatinine move after two weeks on survodutide?accepted · answered 31 Aug 2025102What does a 98.8% purity with a method section attached let me conclude?accepted · answered 22 Apr 202599Is PIONEER-1 a fair comparison of survodutide against its comparator arm?answered 23 Jan 202596What does the mechanism of tirzepatide predict that STEP 4 did not test?answered 19 Oct 202479How do I tell headache from an energy deficit on 900 kcal a day?accepted · answered 7 Jan 202679Why do two papers on STEP 8 report different headline figures?answered 5 Oct 2024
Top questions
40How do I get 12 units out of a vial reconstituted to 5 mg/mL without guessing?5 answers, accepted · asked 26 Mar 202437What is the minimum resistance-training dose that actually holds lean mass while losing 0.9 kg a week?4 answers, accepted · asked 28 Jan 202533How does FGP compare to Nantong Guangyuan Chemical on documentation quality?5 answers, accepted · asked 25 Dec 202432Why did two WWB lots of retatrutide differ on content assay?5 answers · asked 26 Mar 202531Is minus 80 °C an acceptable storage condition for lyophilised survodutide?5 answers, accepted · asked 14 Oct 202520Air bubbles versus dead space — are they the same loss, and does back-loading or an air flush recover anything?3 answers, accepted · asked 5 Mar 202620How many vial-days does a 10 mg vial give at 5 mg/mL on a weekly schedule?5 answers, accepted · asked 23 Oct 202520What does a 99.4% purity with a date of analysis attached let me conclude?5 answers, accepted · asked 12 May 2025