May 1, 1972 - A simple method to seal glass tubing in a dry box. Paul Savino and Robert D. Bereman. J. Chem. Educ. , 1972, 49 (5), p 356. DOI: 10.1021...
A simple means of making connections between sections of Teflon tubing. Keywords (Audience):. High School / Introductory Chemistry. Keywords (Subject):.
seal satisfactorily the metallic wire directly into glass,. e.g., for Al, Cd, Ph, etc. ... glass-Teflon-metal boundary with an air gun or somc. A. K. Vijh and R. S. Alwitt.
second line to the density of the object on line d. Then factor K will be found at this second line on scale K, and the vacuum weight of the object may be ob-.
A convenient method for sealing metallic wires into glass tubing is afforded by a special, heat-shrinkable, two-layered Teflon tubing.
A convenient glass cutter for tubing is constructed from a long-nosed pliers. Keywords (Audience):. First-Year Undergraduate / General. Keywords (Subject):.
A convenient glass cutter for tubing is constructed from a long-nosed pliers. Keywords (Audience):. First-Year Undergraduate / General. Keywords (Subject):.
of the failure to obtain complete separation in one operation. This appears ... a spot of interference figures 9 to 16 sq. mm. in area will appear in the diaphragm.
Within the distilling tube there exists a dynamic pressure gradient which tends to keep the more volatile component away from the warm end and thus favors ...
Jul 1, 1971 - Publication Date: July 1971. Abstract. An effective dry box can be constructed from a glove bag, quarter inch o.d. aluminum tubing, electrician's ...
often poor; many pieces splinter to leave jagged edges. Most three-cornered files are actually six sided so that a broad scratch is made. A convenient device to ...
A Simple Method to Seal Glass Tubing in a Dry Box Research involving air-sensitive or moisture-sensitive compounds many times involves preparing nmr or esr samples in an inert atmosphere. The normal procedure is to load a. sample into a glass tube wntainer which can be removed from the inert atmosphere (glove bag or dry box) and sealed on a vacuum line to prevent contamination. This is s. tedious process if many samples are to be prepared. We have found a simple method whereby small diameter Pyrex tubing (up to 7 mm) can be sealed in a dry box. The apparatus (see figure) consists of a small coil of Nichrome resistance wire wrapped in asbestos tape and wired to a standard rheostat by heavy duty electrical cord. The ten (10) loop coil should be about onethird larger than the tubing being sealed. The coil is mounted with alligator clips to an asbestos sheet for stability and to allow an interchange of coils. A 10-20 V setting on the Variac type rheostat is usually sufficient t o allow the tube to be "drawn out" and sealed. One should take care to avoid contact between the glass and coil.
