X. METHODS FOR THE ANALYSIS OF SACCHARINE PRODUCTS. 



1. Preparation of Sample. Provisional, 

 (a) MOLASSES, SIBUPS, HONEY, ETC. 



Materials of this class must be thoroughly mixed, and in case any sugars 

 have crystallized out these must be dissolved by gently heating before analysis. 

 In the case of comb honey, cut across the top of the comb, if sealed, and 

 separate completely from the comb by straining through a 40-mesh sieve. 



(b) SEMIPLASTIC, SIBUPY, OB PASTY PBODUCTS. 



Weigh 50 grams of the sample into a 250 graduated flask, mix thoroughly 

 or dissolve, if soluble, in water and fill to the mark. Be sure that the solution 

 is uniform, or, if insoluble material is present, that it is evenly mixed by shak- 

 ing before taking aliquots for the various determinations. 



(C) SUGAB AND CONFECTIONEBY. 



Materials of this class must be ground and thoroughly mixed to secure uni- 

 formity of sample. 



2. Moisture. 



(a) BY DBYING. 



(1) IN SUGABS. OFFICIAL. 



Dry from 2 to 5 grams in a flat dish (nickel, platinum, or aluminum) at the 

 temperature of boiling water for ten hours; cool in a desiccator and weigh: 

 return to the oven and dry for an hour or until there is only a slight change in 

 weight. 



(2) IN MASSECUITES, MOLASSES, HONEYS, AND OTHEB LIQUID AND SEMILIQUID 

 PBODUCTS. PBOVISIONAL. 



Prepare pumice stone in two grades of fineness. One of these should pass 

 through a 1 mm sieve, while the other should be composed of particles too large 

 for a millimeter sieve, but sufficiently small to pass through a sieve having 

 meshes 6 mm in diameter. Make the determination in flat metallic dishes or 

 In shallow, flat-bottom, weighing bottles. Place a layer of the fine pumice 

 stone 3 mm in thickness over the bottom of the dish, and upon this place a 

 layer of the coarse pumice stone from 6 to 10 mm in thickness. Dry the dish 

 thus prepared and weigh. Dilute the sample with a weighed portion of water 

 In such a manner that the diluted material shall contain from 20 to 30 per 

 cent of dry matter. Weigh into the dish, prepared as described above, such a 

 quantity of the diluted sample as will yield, approximately, 1 gram of dry 



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