W E MAKE T H E WORLD'S FINEST N M R SAMPLE TUBE
. . . and w e can prove it! In high resolution NMR spectroscopy, four factors point to the importance of using sample tubes manufactured with maximum precision: (a) ease of spinning; (b) minimizing spinning side bands and, hence, some limited degree of sensitivity increase ; (c) thin wall fabrication and a corresponding optimum filling factor; and (d) minimizing errors in resonance line positions when comparing lines simultaneously in separate samples. Now, check the following table which shows the camber and wall thickness variation tolerances to which we manufacture the Wilmad Royal Imperial line of NMR sample tubes. These tolerances have been previously unheard of in the industry. Cat. No.
Camber (Along 7" length)
525-PP
0.001·
526-PP
0.0005*
527-PP
0.001·
528-PP
0.0005·
DIMENSIONS IN INCHES Wall Thickness O.D. I.O. Variation (I.D. to O.D.) 0.1655 ô.iôS ±0.001 ±0.0005 0.196 (50.195 mm.) 0.1655 ±0.001 0.196 (5 mm.) ±0.0005 0.195 0.1655 0.196 ±0.0005 (5 mm.) ±0.0005 0.195 0.1655 ±0.0005 0.196 (5 mm.) ±0.0005
Wilmad Royal-Imperial 5 mm. N M R sample tubes give you consistent optimum performance in any spectrometer, but especially in the higher frequency ranges of units"rated from 100 to 300 MHz. The tubes are manufactured of precision bore tubing and are highly polished for accurate spectral resolution. Buy your NMR sample tubes from the same supplier as the manufacturer of y our spectrometer d o e s . . . Wilmad.
NEW NMR CATALOG AVAILABLE If you haven't received your copy of our new Bulletin 5006-1, write today and we'll send it to you by return mail.
WILMAD GLASS COMPANY INC. Pioneer in Glass for NMR and EPR Spectroscopy
U.S. Route 40 and Oak Rd. · Buena, N.J. 08310 · Phone: (609) 697-3000 Circle No. 112 on Readers' Service Card
VOL. 4 1 , NO. 8, JULY 1969 ·
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