Apparatus preparative

Apparatus. Prepare an open strong-walled glass tube sealed at the lower end, precisely as in Fig. 72 (c) (p. 417), but about 35 cm. in length, and having internal and external diameters 9 and 13 mm. respectively (Fig. 90). 

A lot of help in fault-tracing may he had from charts for specific pieces of apparatus, prepared hy the manufacturer. 

Apparatus. Prepared silica gel plates. Chromatographic tank (see Fig. 8.6). Drummond (or similar) micropipette. 

Weighing the Absorption Apparatus.—Prepare the absorption apparatus for weighing and weigh in exactly the same way as described on p. 63. 

The subject matter is so organized that the instructor can inject his own modifications such as arranging the necessary apparatus, preparing beforehand a batch of some special reagent needed, the scaling up or down of quantities to be prepared, or the utilizing of the finished products in further syntheses and research work. 

Apparatus Prepare the gas in a modified form of the apparatus shown in Fig. 52. The gas is collected by uprward displacement in the apparatus shown in Fig. 58. It is an inverted form of the B-C-D part of Fig. 52 is connected with E by a as before. The solution — ammonium hydroxide — is prepared in the apparatus shown in Fig. 55. This experiment must be performed without interruption, and all parts of the apparatus must be constructed and ready for immediate use before the experiment proper begins. 

Fill a film canister three-fourths full of hot water. Insert the thermometer apparatus prepared by your teacher in the hot water. 

The test has been frequently criticised on account of the minute quantity of nitric peroxide which is measured. This necessitates exact adltcrcncc to standard conditions of working in regard to the design of apparatus, preparation of the test-papers, etc The exact end point is somewhat difficult to determine, and is liable to be affected by the illumination, notwithstanding the use of a standard tint for comparison. 

Testing of rubber and elastomers - Flexing endurance test, definitirHis, apparatus, preparation of test pieces (withdrawn replaced by ISO 132 2011)... 

Either suspension suppositories or suppositories with dissolved active substances can be molded with the suppository molding apparatus. Preparation of suspension suppositories is the most common, however it is also the most critical process, as is discussed elaborately in Sect. 

Apparatus Preparation— Mount the column suitable for the analysis desired (see Appendix XI) in the chromatograph and adjust the conditions to optimum for the column selected (Table 2). Allow sufficient time for the instrument to reach equilibrium as indicated by a stable base line. 

Apparatus Preparation—With the proper column(s) and liquid sample valve in place, adjust operating conditions to optimize the resultant chromatogram. Using the reference standard, introduce the sample in the following manner. 

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