NMR

The magnitude of the magnetic moment in the z axis builds up according to the equation

M₀ - M = k [exp(-t/T₁)]

The magnitude of the magnetic moment in the xy plane decays according to

M = M₀[exp(-t/T₂)]

The spin-spin relaxation time T₂ can be measured by using either the

Introduction
Diffusion experiments (Bruker's diff)

p>TopSpin allows fitting of data points from a variety of experiments. Two fitting algorithms are available.
The first estimates the start parameter from the data points: it only works where one single component is the source of the intensity of the data points. The fitting is done using
                     
                      ct1 dat1 for fitting to the equation I(t) = I(0) + P* exp(t/T1) or
                      ct2 dat2 for fitting to the equation I(t) = I(0) + exp(t/T2).

TopSpin allows fitting of data points from a variety of experiments. Two fitting algorithms are available.
The first estimates the start parameter from the data points: it only works where one single component is the source of the intensity of the data points. The fitting is done using
                     
                      ct1 dat1 for fitting to the equation I(t) = I(0) + P* exp(t/T1) or
                      ct2 dat2 for fitting to the equation I(t) = I(0) + exp(t/T2).

Xwin-Plot is Bruker's interactive plot editor for creating printouts of the NMR data.
It is build of two basic concepts: layouts and data set portfolios. A layout describes all the attributes of graphic objects (position, size, color etc) but does not contain any NMR related data. A layout, once created, can easily be reused by combining it with different potfolios.
In case you make a mistake when creating/changing an object, simply click on the Undo button
In this example we will create an object containing the 1D spectrum of the current topspin data set.

NMR Sample Preparation

Under any circumstances, it is not allowed to prepare the sample at the NMR room: use your lab, or the special lab room at Wolf building.
In NMR, unlike other types of spectroscopy, the quality of the sample has a profound effect on the quality of the resulting spectrum. So that the sample you prepare gives a spectrum in which useful information is not lost or obscured, you must follow a few simple rules.