water content

batch is doing more work than we give it credit for. I have gone back and forth on this for months. The four things a certificate must carry, and what each one is for.…

The claim in the title is exactly the claim I am making: is 99.0% actually fine or am I being sold a rounding error. Nothing implied beyond it. To save the first four…

related substances are doing more work than we give it credit for, and I am aware this is a minority view on this board. Sent one vial to VendorInvestigate and…

Slightly embarrassed to be asking this, but: why does nobody talk about batch. Spent four months confusing area% and mass% in every post I made here. One explainer…

how much of what we believe about batch actually comes from related substances threads — that is what I am asking, and I have already read the wiki twice. Ask what the…

Genuine question, and the title is the question: how much of what we believe about purity actually comes from related substances threads. Related substances itemised…

Posting this as a discussion rather than a claim: three years of water content threads, summarised so you do not have to read them. Why the same vial can honestly…

related substances — what am I missing here — that is what I am asking, and I have already read the wiki twice. Ask what the stability statement was written against —…

genuine question about area percent that I am slightly embarrassed to ask. I am not trying to be the "source?" guy. I would just like a source. The four things a…

Question in the title, detail here: can we stop arguing about related substances until somebody posts a number. Started keeping a folder of every certificate I have…

Posting this because the title is the whole finding — GGPeps vs GL Biochem on the same compound, same month — both cleared 99.0% — and a number without its method is a…

split one vial across VendorInvestigate and PeptideMeter — 97.2% and 96.8%. One vial, one service, one member paying, which is the only kind of result this board should…

Something I keep coming back to: unpopular opinion: most of what gets said here about area percent is guesswork. Spent four months confusing area% and mass% in every…

help me understand area percent, I have read the wiki twice. If this has been answered properly somewhere, link me and I will delete. How to ask for a batch record…

area percent — 13 things I got wrong before I got it right — a position I have arrived at slowly and would like tested. LC-MS gives you identity; UV purity gives you a…

we are measuring certificate of analysis at the wrong time and calling it noise. Change my mind, genuinely — I have no stake in being right about this. Water content…

7th independent test on WXT — 99.2% on a claimed 98.5%, and the trend is the interesting part. That is the headline. The document, the batch and the service are below…

Genuine question, and the title is the question: can we stop arguing about COA until somebody posts a number. Spent four months confusing area% and mass% in every post…

Slightly embarrassed to be asking this, but: purity — what am I missing here. My first certificate had a compound name, a percentage and a logo. I thought that was…

unpopular opinion: most of what gets said here about water content is guesswork, and I am aware this is a minority view on this board. UV at 214nm sees the peptide bond…

area percent — what am I missing here. Searched first, found three threads that contradict each other, hence the post. Asked QSC for the batch-specific certificate and…

The title is the whole question — someone explain COA to me like I have not read a paper in years — but here is why I am asking. The PDF creation date being later than…

Posting this because the title is the whole finding — KP vs BCH on the same compound, same month — both cleared 97.5% — and a number without its method is a rumour.…

The title is the whole question — how much of what we believe about area percent actually comes from COA threads — but here is why I am asking. Started keeping a folder…

does purity actually matter or is it forum lore at this point. Searched first, found three threads that contradict each other, hence the post. Asked QST for the…