has anyone experiences with the storage of PAHs dissolved in DMSO? How long can I store them and under what storage conditions (e.g. at 4, - 20 or - 80°C)?
please note that the heavy, toxicologically relevant PAHs tend to fall out of solution at low temperatures (below -10 °C). IMHO, storing at -20 or -80 °C is not suitable.
I do endorse the recommendation of Mr. Tomas Tomesej. We have tried at -40 C wich was not stable after 24 hours. Observations are specifically for where mercaptons were involved. This was one time observation only. We were advised to preserve the sample in presurised container filled with any inert gas at -40 c with the help of dry ice. Sice the facility was not availabe not tried. you may try as a trial.