​​​​Goss Scientific Instruments Limited

Tel: 01270 580888

E mail: sales@gossinst.co.uk

Copyright 2019. All rights reserved.

Website developed by C. Pullan, Goss Scientific.

Images courtesy of CIL, Wilmad Labglass, Goss Scientific and Dreamstime.

No unauthorised use of images or text from this site is permitted.

Contact

Phone: 01270 580888

Fax: 01270 581455

E mail: sales@gossinst.co.uk

Mon-Thurs 08.00 to 17.00

Friday           08.00 to 16.00

NMR & EPR Tubes

The NMR sample tubes supplied by Goss Scientific are manufactured by Wilmad Labglass, the world's largest manufacturer of NMR precision tubes.
Wilmad Labglass
Wilmad Labglass (SP Scienceware) have over 40 years experience in the manufacture of NMR tubes and other precision glassware and manufacture tubes that perform with the greatest reproducibility and reliability. All tubes are checked individually to meet exacting specifications for camber and concentricity.
 
Wilmad Labglass are an ISO9001 accredited Company.
NMR Tubes
Economy
5mm O.D. Economy Tubes
Also available:
3mm O.D. Economy Tubes
10mm O.D. Economy Tubes
NMR Tubes
Precision
3mm O.D. Precision Tubes
5mm O.D. Precision Tubes
10mm O.D. Precision Tubes
Also available:
4mm O.D. Precision Tubes
8mm O.D. Precision Tubes
Gas Tight Tubes
Low Pressure / Vacuum Tubes (LPV)
Also available:
High Pressure Tubes
Medium Pressure Tubes
EPR Tubes
EPR Capillary Tubes
Quartz EPR Tubes
Suprasil EPR Tubes
Accessories
Tube Caps and Accessories
Many more accessories are
available. Please contact us
for details.
Also available:
EPR / NMR Long Tip Pipettes
Bar Code Tubes
NMR / EPR Reference Tubes
Solid State NMR Accessories
TD NMR and MRI
Transfer Lines / Dewars / Flat Cells etc
Goss Scientific
NMR / EPR tube catalogue
UK Stocked Items - most commonly used.
 
Click on the image to link to the catalogue.
Wilmad Labglass
NMR tube catalogue
As a UK distributor for Wilmad Labglass we can supply their full range of NMR tubes.
 
Commonly used tubes are listed in the Goss Scientific catalogue above. These, plus other tubes, and tube specifications are listed in the Wilmad Labglass catalogue.
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Laboratory and Specialised Glassware

Goss Scientific are distributors for the full range of Wilmad Labglass / SP Scienceware products. 

Wilmad manufacture a diverse range of laboratory glassware as well as Precision Engineered Glass, OEM quartz components and ASTM glassware.

Wilmad manufacture using Borosilicate, Corning, Kimble and Schott glass, are experts in glass to metal sealing and working with quartz - natural, synthetic and Heraeus-Amersil.

 

Please contact us with your requirements for off the shelf or specialised items.

NMR / EPR Tube Product Guides

NMR Tube selection guide

 

Tube Comparison - Economy vs Precision

 

Small Volume NMR - Product Guide

 

Gas Tight Tubes - Product Guide

NMR / EPR Tube Information

Economy or Precision NMR Tubes

 

Economy NMR tubes are recommended only for 1D NMR with small organic molecules (mw<1500) at ambient temperature.Class B (economy) tubes have less thermal shock resistance than Class A (precision) tubes and may contain Fe2O3 which may have an impact on shimming quality.For NMR experiments that involve cooling / heating, biological sample, multi-dimensional, multi-nuclei or DNP techniques, please use Precision tubes (Class A). 

 

Quartz EPR Sample Tubes

 

Product numbers that include "PQ" are Precision Tubes."SQ" are Non- Precision.For EPR experiments that must estimate electron spin density and/or produce highly repeatable signal amplitude between different runs we strongly recommend the Precision EPR Tube.

 

Suprasil EPR Sample Tubes

 

Product numbers that include "PQ" are Precision Tubes."SQ" are Non- Precision.For EPR experiments that must estimate electron spin density and/or produce highly repeatable signal amplitude between different runs we strongly recommend the Precision EPR Tube.

Tube Selection Guide - CFQ or Suprasil

 

Two types of quartz are used for EPR sample tubes:

1) Clear Fused Quartz (CFQ), a naturally occurring material

2) Suprasil, the trade name of Heraeus-Amersil synthetic quartz

Unique Properties of Quartz for EPR

· Quartz is pure silicon dioxide

· Quartz has a high dielectric constant

· Quartz has a low level of paramagnetic impurities

 

Materials of high dielectric constant alter the microwave field and concentrate the field on the sample. The low level of paramagnetic impurity in quartz prevents interferences with the samples EPR lines.

 

Over long periods, CFQ irradiated with UV will discolour. Synthetic quartz transmits electromagnetic radiation through the UV spectrum. Synthetic Quartz EPR tubes (Suprasil) should be used when applying ionising radiation to generate radical species and for a sample of very low signal. In most other cases, Clear Fused Quartz will provide the same results as Suprasil.

 

Due to technological advancements the sensitivity of EPR has increased, the direct result is that certain high Q cavities will pick up the signal from these impurities especially in tubes over 4mm OD.

Clear Fused Quartz (CFQ) is purified from naturally occurring quartz so the existence of certain material radicals from mining is inevitable.

In this instance we recommend switching to Suprasil EPR products which are made of synthetic material and suppress major impurity contents by an average of 2 orders of magnitude.