APRIL. 1952
A SIMPLE GAS DISPERSING TUBE G. DANA JOHNSON, WILLIAM B. LINDSEY, and EARL SEXTON Indiana University, Bloomington, Indiana
THEuse of gas dispersing tubea is convenient to provide are used in Kjeldahl determinations). The tubes are intimate contact between a gas and a liquid. We obtainable from the Hengar Company, Philadelphia. have frequently found, however, that commercially The sections may be readily ground to the desired available sintered glass dispersers have not been avail- shape on a carborundum wheel. The piece is then sealed into pyrex glass using thin pyrex rod to seal able in the sizes and shapes we have desired. A good gas disperser can be readily made by sealing the glass-ceramic joint. The dispersers appear to be a piece of coarsely porous ceramic material into glass quite sturdy, and may be made in about 30 minutes tubes of any desired size or shape. The most conven- by someone moderately familiar with glass manipulaient material is a section of a "Hengar Tube" (mch as tion.
