Search results for query: Residual solvents

We have a moisture analyzer right here and we've used it altogether 4 times in this past year. Until it is proven that there is sufficient interest and need for such analyses, it'd be economically insane to invest into a setup for that. Nobody but specialized laboratories will touch AAS and...

LCMS is not suitable for residual solvents, GCMS is, but it's not about the GCMS part only - you need a proper sample introduction system for highly volatile substances such as residual solvents. This sample introduction system would be vastly different from the one used to introduce high...

Anabolic steroids are not among the most hygroscopic compounds, thus I deem that to be of little relevance. If requested, we can Karl Fischer it for 30 USD.

...as per request. ICP-MS. We can do moisture analysis for 30 USD, which, while rather primitive, can easily identify abundance of residual solvents in a sample. Other than that, we can't run more elaborate test as of now without significant investments, as we're not focused on analysis of...

Well, we can do LCMS testing on AAS too, but it provides zero benefit compared to GCMS. GCMS is simply way more suitable for the task. Our GCMS is set up for semivolatile, high boiling point chemicals, such as AAS and their common impurities. ICP MS each additional element is like 30 USD or...

Aggregates and low water solubility peptides (eg. wrong counterions). How would lipids get there? There are no lipids in peptide manufacture afaik. This ain't cannabis. Well, the first sentence is a bit difficult to decipher, but I believe you've meant to ask if there's any reason it wouldn't...

I'm no expert, nor educated, on manufacture other than solid phase, so I won't comment on that further, but aggregates seldom disaggregate by themselves. Meaning protein aggregates as in technical term. Cheers

I mean, my best guess is residual solvents if I recall correctly.

Who knows. I was actually interested in adding residual solvents test, but the equipment needed would probably never ever pay for itself.

dunno, residual solvents, heptanoic acid or stuff like that you could fund the photon accelerator thermobiologicalmeter purchase to find out!

Correct. I see stuff like on the regular. Except many others don't publish results other than 96 or 98%+. Usually it's unbound ester, degraded hormone, residual solvents, moisture etc. I don't want to get into any discussion here, I just wanted to provide clarification.

I ran some GC/MS tests on some of the ~80% bold u, I think it was indeed just some fatty acids, so vegetable oil... The thing is, if you dilute the bold u by vegetable oil, it won't show on HPLC if you just test it by shooting random amount of bold into LC, you still gonna get dat dere 99%...