APRIL, 1949
A REACTION SAMPLING DEVICE CHARLES E. WHEELOCK Cincinnati, Ohio
TAE device represented in Figure 1 hai'heen founduseful in removing - samples from a reaction mixture during reaction. The device is fitted to the outside neck of a two- or three-neck flask through a 24/40 standard taper joint a t A. A 6-mm. (0.D.I elass tube. bent to conform to the flask and reach to itslbottom, passes through ring seals a t B and C to end in a tip D inside a chamber formed by a sealed-in glass disc a t E. To operate, close the stopcock a t F. Then, with G. connected through a 3-way stopcock to an aspirator, apply suction until the chamber is filled from the stopcock F to the tip D. At this point, open the 3-way stopcock to the air permitting excess liquid to drain back into the reaction flask. Open the stopcock F to drain off the collected sample. Depending on the position of the tip D, a reproducible collection of 2 to 3 ml. is made.
