Author Archives: chemweb

The Gem300 printer doesn’t work duo to its dead network card. A new card has been ordered. Please use the other printers before this printer gets fixed. Continue reading →

The 4-nucleus PFG probe is back from repair and has been installed on the I400. All four nuclei (1H, 13C, 19F, and 31P) work well. Continue reading →

Find z0 has been calibrated on the I500, I400 and VXR400. So the standard procedure can be used: 1) Select solvent and experiment 2) Find z0 3) Gradient shim 4) Autolock or manual lock 5) Acquire You can still use … Continue reading →

Due to lab air outage, the spectrometers in the Chemistry NMR facility will be shut down Tuesday (July 26th) morning 5:30-8:30am. Continue reading →

The button on the top of the file tool which corresponds to the 300 is now marked with user’s three-letter username. Clicking on this button will directly access user’s home folder on gem300. Continue reading →

The NMR facility will be unstaffed on July 4th. Continue reading →

The I400 4-Nucleus probe is being sent for repair. It typically take about 6 weeks for a probe repair. The PFG inverse detection probe is now in. Versus the PFG probe, this probe: – * cannot do 19F and 31P … Continue reading →

The drain valve of the air dryer went bad and needs to be replaced. A new valve has been ordered and will come soon. For time being,  the old valve is used after clean up to keep the spectrometers running. Hopefully it … Continue reading →

We have a problem with the lab air dryer. The spectrometers in the Chemistry NMR facility are temporarily down. Continue reading →

13C and 31P are ok, 1H and 19F work at reduced S/N and longer pulse widths. Probe default values have been updated but proton decoupling for 13C may be affected. 2D experiments should be run on the VXR400 and I500 … Continue reading →