« Last post by Babcock_Hall on Yesterday at 09:38:53 AM »
I suggest starting with the M+2 peak at m/z 173.
Any suggestions for the ratio of Sodium percarb to TEAD?
Thanks for your response, actually I do not believe that it is a tara problem (I checked the balance a few times), even though, I made the first measurement with porcelain pieces inside the flask, obviously, I left them out of the equation for measurement and it was something like this:Unless you live somewhere exceptionally hot, 25 mL PE is not going to evaporate out of the mouth of a flask in just a few minutes. On a large surface? Sure, but not a flask. Sounds like either a human error or a technical error with the scale. I'd repeat the extraction (being very careful to do everything right) and see if the same problem arises.
Mass of the extract from round flask: 93.31 g
Mass of the extract after being transferred: 77.49 g
so I am not certain at all if it is just an evaporation issue