EPR 電子順磁共振儀耗材 EPR Sample Tubes and Accessories

EPR電子順磁共振儀耗材
Impurity Analyses – Clear Fused Quartz (CFQ) vs. Suprasil (Synthetic Quartz)         
• EPR Sample Tubes and Accessories         
EPR Cells     
Dewar Inserts  
Dewar Flasks (Cold-Finger Dewars)   
Variable Temperature Accessories   
Electrolytic Cells for EPR    
Miscellaneous EPR Supplies   

EPR Sample Tubes and Accessories 
• EPR Sample Tubes – Quartz (CFQ)  
• EPR Sample Tubes – Suprasil  
• EPR Graded Seal Sample Tubes  
• Valved and Screw-Cap EPR Tubes  
• Capillary EPR Tubes  
• Special EPR Sample Tubes

EPR Sample Tubes – Quartz (CFQ)
Important Note: Product numbers that include “PQ” belong to our Precision Tube Family with an OD and ID tolerance of ±0.013 mm. Those with “SQ” are not Precision and their OD and ID may vary as much as ±0.4 mm. For EPR experiments that must estimate electron spin density and/or produce highly repeatable signal amplitude between different runs we strongly recommend our Precision EPR Tube.

Save Time Heat-Sealing EPR Samples!
Heat-sealing quartz tubes is difficult enough so we’ve provided an easier way. By ordering our constricted tube you’ll seal EPR tubes more quickly, with less effort. Choose your tube, add the suffix “CONS” to the product number and remember to order 1 inch longer than required.
• Quartz (CFQ) EPR Tubes – 2mm OD
• Quartz (CFQ) EPR Tubes – 3mm OD
• Quartz (CFQ) EPR Tubes – 4mm OD
• Quartz (CFQ) EPR Tubes – 5mm OD
• Quartz (CFQ) EPR Tubes – 10mm OD

Quartz (CFQ) EPR Tubes – 2mm OD

Quartz (CFQ) EPR Tubes – 3mm OD

Quartz (CFQ) EPR Tubes – 4mm OD

Quartz (CFQ) EPR Tubes – 5mm OD

Quartz (CFQ) EPR Tubes – 10mm OD

 ***Special Note: This item not recommended for contemporary EPR****
EPR Sample Tubes – Suprasil
Important Note: Product numbers that include “PQ” belong to our Precision Tube Family with an OD and ID tolerance of ±0.013 mm. Those with “SQ” are not Precision and their OD and ID may vary as much as ±0.4 mm. For EPR experiments that must estimate electron spin density and/or produce highly repeatable signal amplitude between different runs we strongly recommend our Precision EPR Tube.

Save Time Heat-Sealing EPR Samples!
Heat-sealing quartz tubes is difficult enough so we’ve provided an easier way. By ordering our constricted tube you’ll seal EPR tubes more quickly, with less effort. Choose your tube, add the suffix “CONS” to the product number and remember to order 1 inch longer than required.
• Suprasil EPR Tubes – 2mm OD
• Suprasil EPR Tubes – 3mm OD
• Suprasil EPR Tubes – 4mm OD
• Suprasil EPR Tubes – 5mm OD
• Suprasil EPR Tubes – 10mm OD

Suprasil EPR Tubes – 2mm OD

Suprasil EPR Tubes – 3mm OD

Suprasil EPR Tubes – 4mm OD

Suprasil EPR Tubes – 5mm OD

Suprasil EPR Tubes – 10mm OD

EPR Graded Seal Sample Tubes

Need to seal an EPR tube to your vacuum rack?
Some EPR samples are air-sensitive. Since oxygen is paramagnetic, many EPR samples are best studied after degassing. For long-term storage, no other closure is better, but most vacuum racks incorporate Pyrex components. Sealing quartz to Pyrex is a problem, unless you use sample tubes that incorporate a graded seal. Order Wilmad’s Graded Seal/Constricted EPR Tubes, available in a variety of sizes. Other configurations can be prepared, so if you don’t see the size you need, contact us about price and availabiility

Valved and Screw-Cap EPR Tubes
• J. Young EPR Sample Tubes, Valves and Pistons
• Screw Cap EPR Sample Tubes

J. Young EPR Sample Tubes, Valves and Pistons

Wilmad’s J. Young valved sample tubes make difficult samples easy to study. No wonder they’ve become so popular in NMR. Now, you get the same advantages in EPR studies!

It’s a real bargain, too! One tube handles:

 • air-sensitive samples
 • degassed samples
 • catalytic studies
 • gaseous samples
 • volatile samples

The J. Young Valve EPR Tube saves time. No greasy joints to fuss with. Connect it quickly to your vacuum rack. Opens and closes with a quick twist of the wrist. We can add the valve atop any Wilmad EPR sample tube 5mm OD or larger. A graded seal is used to connect the Pyrex portion of the valve to a quartz EPR tube. Two sizes of the valve are available. One is ideal for 5mm tubes, the other for 10mm tubes. One is right for most every EPR sample tube you get from Wilmad.

Replacement pistons and vacuum adapters are sold separately. If you should break the tube, but not the thread, it can be repaired at a cost that’s lower than a new one.

J. Young Valves and Pistons

Screw Cap EPR Sample Tubes

Now, sample tube and storage vial have been joined!
Save time and money with the Screw Cap EPR Tube; each come with a PTFE/Silicone Septum.

Quartz (CFQ) Screw Cap EPR Tubes

Suprasil Screw Cap EPR Tubes

Replacement Septa and Caps

*PTFE/Rubber – Laminated discs consisting of a sheath of Teflon®bonded chemically to white pharmaceutical rubber. Inert to most solvents and many corrosives. Not recommended for multiple punctures.

PTFE/Silicone – Laminated discs consisting of a Teflon®sheath bonded chemically to silicone rubber. Inert to most organic solvents and compounds; however, not recommmended for use with strongly corrosive materials. Resealability properties of silicone rubber are excellent.

Capillary EPR Tubes
• Capillary Tubes for JEOL Spectrometers
• Quartz and Suprasil Capillary Tubes

Capillary Tubes for JEOL Spectrometers

Recommended for use when small aqueous samples are studied using JEOL’s standard TE011cylindrical cavity resonator, these sample “cells” are more durable and easier to handle because of their heavy wall construction (OD = 4.0mm). Made from the highest quality synthetic Suprasil quartz, these capillary cells provide excellent performance at temperatures from 5 to 100°C. You’ll find these cells are fully compatible with JEOL’s tube caps and collet for 4mm OD tubes.

These JEOL capillary sample tubes are used with collet adapters. Collets not included. They are available here:

NOTE: Wilmad does not offer tubes for dosimetry. Please contact the manufacturer of your dosimeter for information about these special sample tubes.

Quartz and Suprasil Capillary Tubes

Conveniently packaged in vials of 25, 50, and 75 pieces, Wilmad Clear Fused Quartz and Suprasil capillary tubes are often used in EPR applications where sample sizes are limited. Available in sizes from 0.40 to 2.4mm OD, these fine tubes are 100mm long and open on both ends. Easy to seal with a hot flame, you can use them with a round bottom or close with a sealant of your choice (beeswax is commonly used.)
Clear Fused Quartz Capillary Tubes

Suprasil Capillary Tubes

NOTE: Wilmad does not offer tubes for dosimetry. Please contact the manufacturer of your dosimeter for information about these special sample tubes.

Special EPR Sample Tubes

High Temperature Sample Tube for Bruker ER4114HT Dewar Insert

Only by making a tapered joint seal with the Dewar Insert is it possible to achieve the highest temperatures with Dewar Insert for Bruker’s ER4114HT Cavity Resonator. Wilmad makes a unique sample tube for use with this special dewar insert. Consisting of a 6mm OD tube that tapers to a 4mm OD below a7/15 inner joint, this tube is prepared with CFQ.

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