主题：在做变温核磁的时候，ＶＴＴＹＰＥ是什么意识啊？／

看看对您有用吗?做生温实验用什么溶剂要看您要做到多少度,70度以上用DMSO-d6比较好,当然还有其它溶剂可用.
Introduction to Temperature Regulation
The parameter "temp" is used to define the temperature that the spectrometer should operate at.
The configuration parameter "vttype" indicates whether or not the spectrometer has variable temperature (VT) capability.

In the case of our INOVA 500, we do have VT capability so strictly vttype should be set to 2. However, if vttype=2 and temp is set to different values in different experiment numbers, when you change experiment number and start an experiment (or type su), the temperature will start to change to the new value. There is no warning of this change (except the setting on the LED display) and often you can proceed without noticing it and be operating at the wrong temperature for some time.
To avoid this problem, it is better to set the temperature, then set vttype=0. When vttype=0, the temperature cannot be changed, so remains at the previous setting until you explicitly change it again.

Instructions for Setting the Temperature - The Hard Way!
Set vttype=2.br>

Set temp=desired temperature then type 'su'. The temperature setting in the console window should change and the LED display should indicate the the temperature at the probe is starting to change.


Set vttype=0. The temperature should continue to be regulated at the set value but should not change if you change to a new experiment or if you change the value of temp.


If you want to change the temperature again, repeat all of the above steps.

Instructions for Setting the Temperature - The Easy Way!
Type permvt(x) where x is the temperature you want to set to vt unit to.

This calls a macro (permvt) which does all the steps in "the hard way" above.

Set temperature

Temperature should be regulated during 2D experiments, fluctuating temperature in 2D experiments will cause noise, particularly in t1 (the indirect detect dimension). This is not a big problem for short 2Ds (10-20 minutes), but with 2Ds acquired for hours, the temperature should be regulated.


To set temperature:

type:

vttype=2  su.

Type the temperature that you want to run the experiment at, if you want room temp, choose slightly more than the VT says the temperature is, maybe 25, so type: temp=25 su.

Temperature should go to that temperature, and when it gets there, the acquisition window will say VT-regulated (while changing temperature, it says VT=not regulated, and when temp='n' then it says VT=off). Vttype should now be set to 0 so that you wont change temperature by mistake, type:

vttype=0 su


If temperature does not respond to changes, type:

temp

Click on Reset VT button

then set temperature to appropriate value

原文由 celan 发表:
看看对您有用吗?做生温实验用什么溶剂要看您要做到多少度,70度以上用DMSO-d6比较好,当然还有其它溶剂可用.

re,像CDCl3作溶剂的话温度限制是64度。

变温实验,我的经历,CDCl3作溶剂温度控制在不超过70就行了.

CHCl3，分子质量119.38，常压下沸点61.2℃！
在一般情况下，我的temp=‘n’，vttype必须等于0，需要升温时，首先vttype=2，su temp=30，su，然后逐渐升到你需要的温度，这个‘逐渐’很重要，防止探头暴冷暴热，升温完后，又‘逐渐’降温至30度，然后temp=‘n’，然后vttype=0，su，完毕。不足之处望大家指正。

原文由 chasgone 发表:
升温完后，又‘逐渐’降温至30度，然后temp=‘n’，然后vttype=0，su，完毕。不足之处望大家指正。

需要将 vttype 改为 0 吗? 我们的谱仪一直都维持在 2.

CDCl3的bp不是61么，为什么限制温度是64亚？

不明白！