#NMR SOFTWARE FOR MAC MANUAL#
#NMR SOFTWARE FOR MAC FREE#

Variable temperature NMR experiments using the liquid nitrogen evaporator These problems manifest themselves quite often and there is no harm in following below instructions.

#NMR SOFTWARE FOR MAC MANUAL#

If this does not work, return to manual shimming on step 2.Īcquisition Problems due to breakdown of communication between console and computer The command topshim lockoff 1h o1p=x.xx will turn the lock off, set the proton frequency for x.xx ppm Turn the LOCK OFF on the BSMS, and press on SHIM.Modify the shims to maximize the proton amplitude and the shape of the signal. To do this, open the BSMS window (type bsmdisp ). gs runs the experiment in 'live' mode, so you can watch the spectrum change while you change the shims at the same time. Run a 1-D simple proton experiment with the default shim set (type: rsh and select an appropriate shim file, see also the basic operation instructions) and take a note of the location (in ppm) of a prominent line.Ģ. Shimming is still recommended and can be done in various ways.ġ. While it is easiest to have deuterated solvents as it makes shimming and long-term experiment more stable, it is not essential. It is possible to do shimming without locking. if it says: 'too many points lost during fit', try: 'topshim convcomp' to compensate for convection currents, especially for non-viscous solvents that are prone to convection currents. if it says: 'not enough valid points', make sure you read the default shim file with 'rsh'. Manual calibration is an interactive tool to set the x-axis to the appropriate chemical with known chemical shift (e.g., a solvent).Īfter performing automated shimming with 'topshim'. If so, it is possible to calibrated the axis by typing 'cal', which opens a dialog box. If everything is adjusted, push: 'On' within the BSMS Control suite / Lock, and it should lock. It may be convenient to adjust the stepsize. When you adjust the values within the BSMS Control Suite, please make sure that the cursor does not leave that window. If the lock signal is not symmetrical: BSMS Control Suite/Lock -> Select: Phase -> Adjust phase. (Optional: Power, but be careful because of power saturation effects) If the lock signal is too big or small: BSMS Control Suite/Lock -> Select: Lock gain -> Adjust gain. If the lock signal shows no signal, or is not centered: BSMS Control Suite/Lock -> Select: Field -> Adjust Field Probably you have observed this kind of image many times for many successfully locked samples. The goal of locking is to have a lock signal displayed that is symmetrical and centered, not too small or too big, with significant ringing. If it locks, fine, if it doesn't, please continue with manual locking. Please go to the LOCK tab.Ĭlick on 'Auto LOCK' and wait for about 1 minute. Make sure that you have the BSMS Control window open. Do you have enough liquid, did you really add deuterated solvent, and is the sample placed within the gauge correctly, did you read an appropriate shim file with 'rsh'?

Make sure that you followed the 'NMR-basic-operation' procedure, in particular, make sure that you followed the procedure about sample preparation.

If the sample does not lock, please do the following: Immediately.Nuclear Magnetic Resonance Facility Department of Chemistry Useful tips and advanced NMR operation Lock issues Otherwise, do not bother and give your customers who were charged to use this app their money back. If you do decide to do the right thing and start fixing and updating this iPad app, make sure you don’t expect to still charge people to use it if/when your Tablet software is ever worked on again. I CARE ABOUT HAVING TO PAY TO USE SUCH AN APPLICATION EVEN THOUGH IT’S NOT WORTH A SINGLE PAYMENT OF JUST ONE CENT.Īn otherwise content customer for over the last 10 years I CARE ABOUT USING SOFTWARE THAT IS IMPORTANT TO MY WORK AND LIFE.

#NMR SOFTWARE FOR MAC FREE#

I DON’T CARE ABOUT YOUR 45 DAY FREE TRIAL. How do you sleep at night knowing you charge students and scientists such outrageous costs already, and yet you keep your Tablet application in the Apple and Google app stores even though you know the application will not work on most people’s devices anymore, since the last time it was updated most of the tablets in the world right now hadn’t even been built yet. It’s been over three calendar years since your company last UPDATED a version of “MNova Tablet.” How dare you have the audacity to charge a monthly fee to use this very unstable abandoned software.

Nmr software for mac