A Simple Device for Washing NMR Tubes Washing nmr tubes is a tedious and time-consuming task for those who frequently use this technique. We show in the figure a simple, inexpensive apparatus which can be easily constructed by any skilledglassblower. The nmr tube to be cleaned is inverted over a 3-4 mm a d . outlet tube, and the appropriate cleaning solutions are forced from reservoir A to reservoir A through the tube by applying the vacuum (via C). Once reservoir A is emptied, drying is effected quickly by the stream of air due to the vacuum. Recovery of the cleaning solutions is easily made from reservoir A. It is our experience in the last few years that cleaning and washing of nmr tubes with this device isvery efficient and quicker than with other described apparatuses [Jacobsen, N. W., J. CHEM. EDUC., 47,507 (1970); Ladner, K. H.. and Hinton, J. F., J. CHEM. EDUC., 47,704 (1970)].
Ottorino De Lueehi Gian Franco Miozzo University of Pndora Institute of O r ~ a n i cChemistry Padovn, Italy
124 1 Journal of Chemical Education
