Apparatus for converting simple and most complex cyanides into HCN and for from most interferences before measuring by titration or colorimetric analysis examination of industrial wastes and other water. Method is described in Standard the Examination of Water and Wastewater. Fourteenth Edition, 1975. consists of a 500mL Claisen flask with 24/40 joints, thistle tube, Allihn condenser, tube 24/40 - 18/7, elbow connector 18/7, 270 mL spiral gas washer, stopcock flask.