Powdered samples can be funneled and packed into the insert and gelatinous samples can be warmed and transferred into the insert as a fluid via syringe. Spinning rates in excess of 3KHz were reported with gelatinous polysaccharide samples. Rotor inserts are now available for all major MASS probe types, including those from Bruker, Chemagnetics, Doty, and Varian. Product numbers and a description of the rotor into which each fits is provided in Rotor Insert Listings in Wilmad's NMR96 catalog online. Let us know.
Chances are good that an insert can be prepared for it, too.
Contact Wilmad with details of the rotor dimensions. 1 J. D. Gay, J. Mag. 2 D. Geschke and E. Quillfeldt, J. Mag. 3 P. J. Giammatteo, J. Mag. 3M Co. Macor is a trademark of Corning.