For use in the determination of cyanide in surface waters, domestic and industrial wastes, and saline waters. Unit consists of a 500 ml Claisen flask with standard taper (24/40) outer joints, thistle tube, Allihn condenser, connecting tube with a standard taper (24/40) inner joint and a spherical (18/9) ball joint, elbow connector with 18/9 socket, Gas washer with sealed in frit, 90-degree connecting adapter, stopcock adapter and suction flask.