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NWTC NMR Laboratory Capabilities |
NMR Analytical Applications at the NWTC Laboratory |
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Solution State NMR Spectroscopy Capabilities:
- 1D NMR Spectroscopy - 1H, 19F, 1H coupled & decoupled 31P,
13C (BB decoupled), 13C DEPT, APT, JMOD.
- 2D NMR Spectroscopy with Gradients – 1H-1H COSY, TOCSY, NOESY, ROESY; 1H-13C HMQC/HSQC, HMBC; 13C-13C INADEQUATE
- Variable Temperature Experiments – Low and high temperature 1D and 2D NMR spectroscopy.
- X-nuclei NMR Spectroscopy, e.g. 27Al, 29Si, 2H, 11B, 15N studies.
- Selective 1D NMR with Pulse Field Gradients – NOESY, TOCSY, etc.
- Diffusion Spectroscopy (DOSY)
Solution State NMR Spectroscopy Applications:
- Structure elucidation, molecular connectivity, conformational analysis.
- Quantitative NMR – General assay and determination of chemical composition, purity, molecular weight and formulae of mixtures.
- Determination of polymer composition and arrangement, monomer ratio of various copolymers, etc.
- Stability testing over numerous variables such as changes in temperature, concentration and pH.
- Study of exchange processes – inter and intra-molecular exchange.
- 27Al & 29Si – Determination of 27Al & 29Si speciation in various 27Al & 29Si containing materials.
- 19F – Degradation of fluoride species in toothpastes, structure elucidation.
- 31P – 31P speciation in various materials, structure elucidation.
Solid State NMR Spectroscopy Applications:
- Magic Angle Spinning
- 29Si – Silicon / Aluminium ratios in zeolites, Q species in silicates, identification of alumino-silicates in powders, tablets.
- 31P – Phosphorus species in tablets, powders, muscle, plant tissues.
- 13C – Identification of organic molecules, crystallographic differences / changes, reaction mechanisms, soils.
- 27Al – Aluminium species in anti-perspirants, zeolites.
- 19F – Identification of fluoride species in toothpastes.
Solid State NMR Spectroscopy Applications:
- MRI & Relaxometry
- Pharmaceutical Industry – tablet swelling / cracking /dissolution /drying, diffusion of benefit agents, etc.
- Agriculture – Seed germination, plant growth under various conditions, cooking processes, fruit traumas, etc.
- General – Kinetics of drying / wetting, diffusion, pore filling, soap bar mushing, ingress and egress of water, oil in porous rocks.
- Solid-liquid ratios of oils and fats – e.g. The margarine industry
- Quantitative determination of phase composition, e.g. solid, liquid crystal, isotropic of soap bars, detergent products (the only way to do it!).
- Plasticisation of polymers.
- Glass transition temperatures of polymers.
- Whereabouts of fluoride species in toothpastes
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