High-Field NMR vs Low-Field NMR

Generally, high-field NMR means the magnet field is higher than 1 Tesla, middle-field NMR means the magnet field is between 1 Tesla and 0.5Tesla, low-field NMR means the magnet field is lower than 0.5T. They have different application fields.Low-field NMR is used for analyzing the reaction among molecules. For example, water can be divided into combine water, free water according to water molecule’s phase, cross-link density of polymer. And high-field NMR is used for molecule structure analysis.

High-Field NMR
->1T (Imaging quality)
-superconducting magnet (Homogeneity)
-Heavy, expensive, higher maintenance cost
Low-Field NMR
-<1T (Less effect by ferromagnetic material )
-permanent magnet (no maintenance cost)
-Low weight, portable, inexpensive

Low-Field NMR analyzer is more suitable for porous media analysis

high-field-nmr-vs-low-field-nmr

Spin Finish Analyzer

Niumag PQ001 Spin Finish Analyzer was launched in 2008. After years of upgrading, PQ001 has many advan ages such as small size, high precision, good repeatability, good stability and excellent cost/benefit characteristics. Based on these advantages, PQ001 has been widely used in the determination of oil content of textile fiber.

Functions:
Rapid determination of Spin Finish content of textile fiber

Decades ago, when fiber products were mainly processed within the same textile mill or factory, analytical testing was still in the fledgling stages if available at all. Over the years, as the industry grew and trade increased, mechanical tests and wet chemical analytical tests were introduced. The determination of the Spin Finish content on fiber materials quickly gained importance as a wet chemical extraction method. The testing was slow (at least a couple of hours), operator-dependent, destructive, and hazardous because it required extraction solvents.

Principles of NMR Method
The TD-NMR signal of a fiber sample exhibits different components, each characterized by a typical decay behaviour. Whereas the fiber shows a very rapid signal decay, moisture on the fiber is characterized by an intermediate relaxation behaviour.
Well separated from both is the NMR signal of Spin Finish. Therefore, Spin Finish can be observed and quantitatively analyzed by routine TD-NMR methods.

Applicability of Spin Finish Method
Bruker has proven in multiple studies that TD-NMR methodology works well for almost all types of fibers and Spin Finishes. Based on this experience of many years, multiple proven methods have been released, e.g. for technical and textile fibers multifilament, monofilament, staple fibers as well as texturized samples polyester, polyamide, polypropylene, polyethylene, polyacrylonitrile fibers and yarns polypropylene, polyethylene nonwovens.

Textiles Benchtop NMR Analyser

For most of the last 10 years, niumag Instruments have been the industry standard throughout the world for finish on fibre determination by benchtop NMR. Synthetic fibres such as polyamide, polyester and nylon are sprayed with an oil-based coating (spin finish or OPU) to reduce static electricity and friction as well as enhance other physical characteristics.

Determination of the coating levels is vital for optimising the manufacturing process. Benchtop NMR is a clean, fast and accurate technique for the measurement of finish content and is a viable alternative to traditional wet chemical techniques which are time consuming, use hazardous chemicals and require skilled laboratory personnel. Also, NMR is capable of measuring finish levels below those accurately measurable by solvent extraction.

PQ001 NMR Analyzer was launched in 2008. After years of upgrading, PQ001 has many advantages such as small size, high precision, good repeatability, good stability and excellent cost/benefit characteristics. Based on these advantages, PQ001 has been widely used in the determination of oil content of textile fiber.
Basic Parameters:
Magnet type: permanent magnet
Magnetic field intensity: 0.5±0.08T
Probe: Ø25mm
Size (LxWxH): 1685mm×520mm×386mm
Weight: 134Kg
Functions:
Rapid determination of Spin Finish content of textile fiber

Solid Fat Content Benchtop Analyzer System

In many industries there is a requirement to accurately, reliably and simply measure the amount of a viscous or liquid component in the presence of other solid materials. The PQ001 meets this requirement with a technology that avoids the needs to separate the different phases; making sample preparation trivial, removes the need for extensive operator training, and provides fast accurate results. That means a more consistent product from your manufacturing operations, better process control, and reduced costs.

Our development and applications teams have created industry-specific applications for the following:

Lubricant on fibre, yarn or textile – spin finish, oil pick up (OPU), finish on yarn (FOY), avivage
Oil content of oil seeds
Oil content of snack foods
Oil and fat content of foodstuffs
Solid Fat Content (SFC)

The PQ001 nmr analyzer is not just a benchtop system or mini NMR system; it is a dedicated analyzer providing a complete solution off the shelf. With easy installation, comprehensive calibration and calibration transfer standards, the PQ001 is ready for use within minutes. This approach is a result of Bruker`s extensive experience in these dedicated applications.

Ready-to-go

The PQ001 analyzers come complete, ready-to-install, with calibration standards and traceable multi-language software. The installation instructions can get easier than this: place the PQ001 on your lab bench, connect only two cables: the Ethernet cable to your PC and the power cord, switch it on and in 30 seconds the PQ001 is operational.

Better for your Laboratory

Nowadays, laboratory space is precious. The current version of PQ001 has a smaller footprint than its predecessor, thus requiring less valuable space on your laboratory bench. Moreover, the PQ001 is a quiet-runner, its low decibel operation noise will keep your laboratory quiet.

Performance You Can Rely On
Precise and long-term stable results can only be achieved with an optimal system layout. The PQ001 with its all-in-one design perfectly matches these requirements. Both long-term and short-term measurement stabilities for the application of interest have continually been improved further. The system`s internal temperature is kept at a constant higher than room temperature (typically, but not limited to 40 °C) to within a 1/100 of a degree Celsius to guarantee optimal performance in a 24/7 operation.

Agriculture, Food & Beverage NMR Analysis

Quality control for consistency of food products from field to fork is of prime concern to manufacturers and consumers alike. Making products that look, smell and taste good ensures consumers come back for more. So, with an ever-growing population demanding more food products than ever before, simple instrumental test methods are required to provide quick and reproducible data from the field to the factory via the shopping cart to the consumer. For example, the measurement of oil and fats are invaluable in the control of many foods, particularly in snack food products such as potato chips. In a similar way, the quality of the simple bar of chocolate may be judged its solid fat content using a rapid measurement which will determine a perfect product while on the farm, oil in seeds is vital to productivity and yield, ultimately dictating the price the farmer is paid for his products.

Quality control for consistency of products at maximum yield produced in the most environmentally friendly yet cost-effective manner is a major driver in today’s agriculture markets.

With an ever-growing population demanding more food products than ever before, simple instrumental test methods are required to provide quick and reproducible data from the farm to the table of the consumer.

Parameters such as the measurement of oil and moisture are invaluable in the control of animal and fish feeds. Similarly, seed quality may also be judged on oil and moisture content with a rapid measurement determining acceptance or rejection and ultimately the price paid by the factory.

Using Benchtop NMR Analyzer  for Food Authenticity Screening

Recent advances in benchtop NMR (Nuclear Magnetic Resonance) mean that it is suitable as a fast and easy technique for assessing suspected edible oil contamination/adulteration and meat speciation. The system can be used to discriminate between different oil types and provide quantitative information for mixtures. The NMR spectra of triglycerides contain valuable information indicating what the meat species is.

Using NMR Analysis for Food Process & Production

Quality control for consistency of food and beverage products is of prime concern to manufacturers and consumers alike. Ensuring that produce looks, smells and tastes good, means consumers come back for more.With an ever-growing population demanding more food than ever before, simple, repeatable, instrumental test methods are required which quickly provide data from the factory, which allows a sustainable, secure supply of good quality food to the consumer.

Measuring Fat and Oil in Food
Fat and oil play a key role in determining the nutritional value, product quality and consumer appeal of food products.

Oil content in snack foods Measuring Oil in Snack Food
Careful control of oil in snack food is essential in ensuring product consistency in the fast growing global snack food industry.

Triglycerides in foods Fatty Acid Composition of Triglycerides
Fatty acid composition of oils and fats is important for health, polyunsaturated fats and omega-3 oils are generally considered to be good for health.

Using Benchtop NMR for Meat Speciation
In recent years there have been a number of scandals involving fraudulent mislabelling of meat in the human food sales chain.

Solid fat content in foods Measuring Solid Fat Content (SFC)
The measurement of SFC within the baking, confectionary and margarine industries is essential as fats are crucial to many processed foodstuffs.

Oil and water in seeds Measuring Oil and Water in Seeds
Levels of oil and water in seeds are critical parameters which need to be understood at all stages of production.

Practical Small Animal MRI

Practical Small Animal MRI is the seminal reference for clinicians using Magnetic Resonance Imaging in the diagnosis and treatment of veterinary patients. Although MRI is used most frequently in the diagnosis of neurologic disorders, it also has significant application to other body systems. This book covers normal anatomy and specific clinical conditions of the nervous system, musculoskeletal system, abdomen, thorax, and head and neck. It also contains several chapters on disease of the brain and spine, including inflammatory, infectious, neoplastic, and vascular diseases, alongside congenital and degenerative disorders.

The two authors, a radiologist and a neurologist, supported by two other contributors, each have over 20 years’ experience in MRI, and this is borne out by the huge amount of information and images presented.

A fascinating insight into the field; the text is well-written and extremely detailed…. invaluable as an introduction to principles of the physics of MRI and the challenges of producing diagnostic images without artifacts, and as a reference for use in clinical situations.

The extensive experience of the authors combined with a comprehensive review of the literature published on small animals MRI imaging make this the most comprehensive text on this subject…. the image quality is excellent.

I purchased the book for my boyfriend as a gift. He’s an MRI tech/Vet tech for a veterinary neurology practice. He really enjoys the book and says that it is exactly what he needed. He thinks the content is well written and has helped him with MRI scanning. His only complaint is that in three months the book is falling apart. This isn’t a book that gets throw around or misused. Half of the neurology chapter has fallen out of the book along with some other pages. Considering the cost of the book this is very surprising. At this rate this book may not last a year. Not sure if it’s just his copy or if others have had the same experience. Unfortunately, because of this experience I can not recommend getting the hardcover version of this book.