
Heeft iemand trouwens ervaring met het herkristalliseren van spice dmv. natriumcarbonaat (sodium carbonate)?
Posted 07 September 2011 - 11:56 AM
Posted 07 September 2011 - 01:46 PM
Posted 07 September 2011 - 01:55 PM
Posted 08 September 2011 - 03:17 PM
Paar vraagjes:
- op het einde nog eens herschoonmaken, is dat echt nodig? Lijkt me dat je msch wat kan verliezen ofzo.
Posted 25 October 2011 - 10:02 PM
Posted 25 October 2011 - 10:56 PM
Drugs against War
... R.I.P. Toasted ...
Posted 26 October 2011 - 06:17 AM
Posted 26 October 2011 - 06:42 AM
Drugs against War
... R.I.P. Toasted ...
Posted 26 October 2011 - 06:59 AM
Posted 26 October 2011 - 08:33 AM
Posted 26 October 2011 - 03:51 PM
As to melting points, some in the literature are of plant isolates and other are of synthetic samples. A brief and incomplete survey has revealed the following numbers, all in °C: 44, 44.6-46.8, 46, 47, 48-49, 49-50, 56-57, 57-59, 58-60, 64-67, 67 and 67-68. The 58-60 and 64-67 values are from the Aldrich Chemical Company, for samples bearing the purity claims of "puriss" and 99+% "Gold Label" resp. The Merck Index gives the very early, very low values of 46 °C and 44.6-46.8 °C and claimes that the bp is 60-80 °C with atmospheric pressure being implied. It is clearly in error on both matters. No evidence has been published suggesting polymorphism.
Drugs against War
... R.I.P. Toasted ...
Posted 26 October 2011 - 09:58 PM
As to melting points, some in the literature are of plant isolates and other are of synthetic samples. A brief and incomplete survey has revealed the following numbers, all in °C: 44, 44.6-46.8, 46, 47, 48-49, 49-50, 56-57, 57-59, 58-60, 64-67, 67 and 67-68. The 58-60 and 64-67 values are from the Aldrich Chemical Company, for samples bearing the purity claims of "puriss" and 99+% "Gold Label" resp. The Merck Index gives the very early, very low values of 46 °C and 44.6-46.8 °C and claimes that the bp is 60-80 °C with atmospheric pressure being implied. It is clearly in error on both matters. No evidence has been published suggesting polymorphism.
Dus als je de temp onder 40°C houdt dan zit je goed, al is smelten niet erg. Wat ik zou doen is een versterker of een computer of iets dergelijks vinden die (aangenaam) warm wordt en het daarop leggen.
En ik ga niet claimen dat als hjet wit is het per definitie goed en rookbaar is, wil je het zeker, weten ga even langs de testservice..
Posted 26 October 2011 - 10:09 PM
Drugs against War
... R.I.P. Toasted ...
Posted 29 November 2011 - 10:05 PM
Posted 29 November 2011 - 10:15 PM
Posted 29 November 2011 - 10:24 PM
Important notice: Due to the current financial crisis, we have decided to temporarily turn off the light at the end of the tunnel.
Thank you, the mdgt.
Posted 29 November 2011 - 10:31 PM
^Indeed. Ik zou haast zeggen: des te langer je wacht, des te beter.
Posted 29 November 2011 - 10:49 PM
Drugs against War
... R.I.P. Toasted ...
Posted 29 November 2011 - 11:03 PM
Posted 30 November 2011 - 08:06 AM
0 members, 0 guests, 0 anonymous users