Quantitative measurement of Mono-Ethylene Glycol (MEG) content using low-field Nuclear Magnetic Resonance (NMR)

Detection of honey adulteration using benchtop 1H NMR spectroscopy

“…Recent developments in utilising permanent magnet arrays to produce moderate magnetic eld (1-2 T, n 0 ( 1 H) = 40-90 MHz) benchtop systems have enabled such NMR-based chemical resolution and quantication at a fraction of the cost using more compact and mobile hardware. 21,22 The size of HF NMR spectrometers are ∼1 m 3 , they weigh >500 kg and cost on the order of millions of dollars. Conversely, benchtop NMR systems are ∼0.1-0.2 m 3 in dimension, weigh <50 kg, and cost an order of magnitude less…”

Enhancing 19F Benchtop NMR Spectroscopy by Combining para-Hydrogen Hyperpolarization and Multiplet Refocusing

“…In recent years, benchtop NMR spectrometers with moderate fields of 1–2 T and line widths of <0.5 Hz, have emerged as a promising alternative to traditional high-field NMR spectrometers for applications where instrument size and/or cost are a limiting factor and for use in nontraditional environments, such as within a fume cupboard in a synthetic lab. − While benchtop NMR spectrometers benefit from increased portability and lower purchase and maintenance costs, they suffer from reduced sensitivity and chemical shift dispersion due to their lower magnetic field strengths . The resolution challenge of benchtop NMR is particularly acute for protons because of their narrow chemical shift range, which leads to signal overlap and strong coupling effects.…”