Sealing Cells

for Liquids and Semi-Solids

When  the decision was made to design our probes for liquids MAS as well as solids MAS, it was apparent that many things would   have   to be considered that would never be of consequence in a strictly solids MAS probe.  To be sure, designing for “high resolution” within an asymmetric MAS structure was the most demanding, but a second problem was nevertheless one of significance.  If the MAS probe was to be used for liquids or tissues, there must be a way to contain these samples in a leak free container.   The solids rotors and caps would be difficult to use consistently in this manner.  The sealing cells designed for this purpose actually have a plug that tightens as the cell is spun.  (Athough designed for liquids, many users find these cells convienent for solid “standards” or for storing samples.)

All sealing cells are for use inside XC and DI thin-walled ceramic rotors. The plastic cells are available in Kel-F with teflon plugs for proton NMR or in ultem with polyvinyl-chloride (PVC) plugs for fluorine NMR.

All cells are suitable for long-term sample storage without loss. They may be used with all common solvents, including acetone, alcohols, benzene, DMSO, ethers, methylene chloride, strong bases, and most strong acids, - as long as the sample density does not exceed the density of the plug (2.2 g/cm³ for teflon, 1.4 g/cm³ for PVC).     

DI and XC Kel-F (or Ultem) Insert Cell With Plug for Liquids or Semi-Solid Samples
Note: DI rotors use a front turbine and a rear tip cap, not the rear turbine
shown in the sealing cell picture above.

4 mm DI4 Sealing Cells. (For thin wall rotors )
Kel-F cells with teflon plugs or Ultem cells with PVC plugs.
Use with thin-walled rotors and DI caps.

               Kel-F        Ultem       Sample       Price

               Part #       Part #       Volume        ____

    DI4       95142       95143          50 μL.........$35

    DI4       95141       95139          20 μL...........35


 4 mm XC4   Sealing Cells.   (For thin wall rotors )  
Kel-F cells  with teflon plugs or Ultem cells with PVC plugs.

Use with thin-walled rotors and short XC caps.

              Kel-F        Ultem       Sample       Price

              Part #       Part #       Volume        ____

  XC4       99694        99691         40 μL..........$35

  XC4       99693        99689         20 μL............35
  XC4       99692        99688         10 μL............35

  XC4       99802        99796           4 μL............35

5mm XC5 Sealing Cells.   (For thin wall rotors )     

Kel-F cells with teflon plugs or Ultem cells with PVC plugs.

Use with thin-walled rotors and short XC caps.

               Kel-F       Ultem     Sample      Price

               Part #      Part #     Volume       ____

XC5         99801      99793      75 μL............$35

XC5         99799      99792      50 μL.............35

XC5         99797      99789      20 μL.............35          

7 mm XC7 Sealing Cells.   (For thin wall rotors )     

Kel-F cells with teflon plugs or Ultem cells with PVC plugs.  

Use with thin-walled rotors and short XC caps.

             Kel-F         Ultem      Sample      Price

             Part #        Part #      Volume       ____

  XC7       99629        99633        225 μL.......$35

  XC7       99628        99632        100 μL.........35

  XC7       99627        99631          50 μL.........35 

  (Prices are USA prices. Foreign prices higher, plus taxes.)

Please contact sales with questions or quote requests.