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Development of low field nuclear magnetic resonance microcoils
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Image of FIG. 1.
FIG. 1.

The probe compartment of rf coil with tubing for sample delivery; US quarter is shown for scale.

Image of FIG. 2.
FIG. 2.

One half of the five turns Helmholtz spiral rf coil with tubing channel seen below the coil.

Image of FIG. 3.
FIG. 3.

The tubing of flow package goes into the channel between the halves of the coil across the region of the highest coil sensitivity.

Image of FIG. 4.
FIG. 4.

A single scan spectrum of water. The linewidth is 0.59 Hz (0.02 ppm).

Image of FIG. 5.
FIG. 5.

A 16 scans spectrum of methanol.

Image of FIG. 6.
FIG. 6.

A 16 scans spectrum of 1-propanol.

Image of FIG. 7.
FIG. 7.

An axial image of the sample delivery tubing filled with water. The tubing ID was 1.02 mm.

Image of FIG. 8.
FIG. 8.

An image of the laminar flow of water in the sample delivery tubing. The flow rate was 0.001 mL/s.

Image of FIG. 9.
FIG. 9.

Fitting of the experimental data (open circles) with the theoretical parabolic velocity profile (solid line) of a Newtonian fluid.


Generic image for table
Table I.

Electrical characteristics of Helmholtz rf microcoil.

Generic image for table
Table II.

Chemical shifts (multiplicity) of methanol and 1-propanol.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Development of low field nuclear magnetic resonance microcoils