the minispec ProFiler
The minispec ProFiler is a handheld NMR instrument for relaxation measurements in the near surface volume of unrestricted size samples.
Single-Sided NMR is the generic name associated with these types of NMR devices.
mq-ProFiler: a bench-top spectrometer for single-sided NMR
The mq-ProFiler is a compact NMR relaxometer, equipped with single-sided magnet and RF probes for performing 1H-NMR experiments within the first few millimeters below the surface of arbitrarily shaped samples.
The system is based on Bruker`s well-proven minispec mq series console, a broadbanded electronics unit which works with any kind of minispec probe. The magnet assembly of the mq-ProFiler consists of two rectangular magnets, placed in an antiparallel configuration and fixed to an iron yoke, and generates a static surface field. The winning features that distinguish the mq-ProFiler from other single-sided NMR tools are mainly related to its RF probe design.
The need for quality control in the food industry has led to exploratory investigations with the mq-ProFiler. Most applications are devoted to distinguishing fat and water compartments. The classic CPMG spin-echo pulse sequence is frequently applied to food emulsions and fish. Specially designed sequences were developed by Bruker which exploit differences in both relaxation rates and diffusion coefficients for water and lipids leading to improved accuracy of the measurements. The overall sample preparation and measurement times for single-sided NMR and the accuracy of the results are now comparable with the capabilities of conventional low-field NMR. Many other applications of single-sided NMR are currently being developed in various research areas.