Report of the Committee on Editing Tentative and Offical Methods of Analysis, the Association of Official Agricultural Chemists . h the secondperforation in the stopper connect the evolution flask (F) with a reflux condenser(G), consisting of a J inch glass tube around which is wound a small lead pipe carry-ing a current of cold water. To the upper end of the condenser attach a U-tubecontaining a little calcium chlorid (to be renewed when it has liquefied) to retain thebulk of the moisture. Connect this U-tube with a second U-tube (H), filled withcoarse calcium chlorid, and this in turn with a
Report of the Committee on Editing Tentative and Offical Methods of Analysis, the Association of Official Agricultural Chemists . h the secondperforation in the stopper connect the evolution flask (F) with a reflux condenser(G), consisting of a J inch glass tube around which is wound a small lead pipe carry-ing a current of cold water. To the upper end of the condenser attach a U-tubecontaining a little calcium chlorid (to be renewed when it has liquefied) to retain thebulk of the moisture. Connect this U-tube with a second U-tube (H), filled withcoarse calcium chlorid, and this in turn with a third U-tube (/v), filled at I with a 3inch column of pumice stone impregnated with copper sulphate and completely de-hydrated at 150°C., the remainder of the tube being filled with fine calcium the U-tube {K) with a bent glass tube having a stop-cock (L) which isclosed when the apparatus is not in use. Next attach the absorption U-tubes (Af)and {N) which are § inch in diameter and 5 inches long, the first filled mainly withsoda lime but containing a little calcium chlorid at the end where the air current. FIG. 15. HEIDENHAINS APPARATUS FOR THE DETERMINATION OFCARBON DIOXID. enters, the second filled one half with soda lime and one half with calcium chlorid,the latter being placed at the side where the air current leaves. Connect N witha guard tube (0), filled with calcimn chlorid on the side toward N and with sodalime on the side toward P, the latter being a small U-tube trapped with glycerol toindicate the passage of the air current. Connect P with a safety bottle {R), toreceive any water which may be sucked back from the aspirator, and connect Rwith the aspirator (S), a 4 liter Mariette bottle. The tubes (M) and (A^) should hold about 20 grams, making the capacity of Mfor carbon dioxid almost 1 gram and that of N for moisture gram. M shouldbe refilled when its weight has increased gram and N after an increase of in weight. Use the best gra
Size: 2186px × 1143px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisherbaltimorewilliamsw
