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Suprasil EPR Tubes
Thin Wall Suprasil EPR Sample Tube
EPR Tube Product numbers that include “PQ” belong to our Precision Tube Family. Those with “SQ” are our Economy brand tubes.
GROUP SKU : WILMAS-SUPRASIL-EPRTUBES
- Precision brand EPR tubes hold 10-15 times tighter tolerance on the inner diameter, and >5 times smaller camber and concentricity over Economy Brand tube.
- Precision tubes are recommended for cw-experiments that require a constant filling factor or reproducibility on sample volume in the cavity.
- Clear Fused Quartz (CFQ) is purified from naturally occurring quartz so the existence of certain material radicals from mining is inevitable.
- Due to technological advancements the sensitivity of EPR has gradually increased.
- The direct result is that certain high Q cavities will pick up the signal from these impurities, especially in tubes of over 4 mm OD.
- In this case we recommend switching to Suprasil® EPR products which are made of synthetic material and suppress major impurity contents shown in Table 1 by the average of 2 orders of magnitude.
- Impurity analysis test results for Suprasil® are shown below:Chemical impurity analysis results for CFQ are shown below: Table 1: Impurity Analysis for Clear Fused Quartz (unit: ppm in weight) Al Ca Cr Cu Fe K Li Mg Mn Na Ti Zr 15 0.5 <0.05 <0.05 0.1 0.4 0.6 0.05 <0.05 0.3 1.1 0.7 Table 2: Impurity Analysis for Suprasil Quartz (unit: ppm in weight) Al Ca Cr Cu Fe K Li Mg Mn Na Ti Zr <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 For photochemistry studies, the cut-off wavelength is 265 nm for CFQ and 190 nm for Suprasil.
- Scientists rely on the expertise and artistic skills of Wilmad-LabGlass engineers and glass specialists to manufacture NMR and EPR consumables and laboratory glassware of the highest quality.
- Used daily in academia, healthcare and chemical, petroleum and other industrial applications, Wilmad offers 7000+ items as part of their standard catalog as well as custom fabrication for individual glassware, glass repair services and OEM glass parts.