XIV] SPICES AND OTHER CONDIMENTS 323 



5 TOTAL SOLIDS— TENTATIVE. 



Weigh 10 grams of the sample into a flat-bottomed, platinum dish having a diam- 

 eter of about 6 cm., spread the sample in a thin layer, evaporate to dryness on a 

 steam bath and dry in a water oven for 4 hours. 



36 INSOLUBLE SOLIDS.-TENTATIVE. 



Wash 20 grams of the sample repeatedly with hot water, ccntrifugalizing after 

 each addition of water and pouring the clear, supernatant liquid through a tared- 

 triple filter paper on a Biichner funnel. After 4-5 washings transfer the remaining 

 insoluble matter to the filter, dry for 2 hours at 100°C., cool in a desiccator and 

 weigh rapidly. The paper used should be dried for 2 hours at 100°C., cooled in a 

 desiccator and weighed. A cylinder, 1-1 f inches in diameter and 5-6 inches long, 

 is convenient for washing and centrifugalizing. 



37 SOLUBLE SOLIDS.-TENTATIVE. 



Subtract the percentage of insoluble solids from the percentage of total solids 

 to obtain the percentage of soluble solids. 



38 SAND.-TENTATIVE. 



Weigh 100 grams of the well mixed sample into a 2-3 liter beaker, nearly fill the 

 beaker with water, and mix the contents thoroughly. Allow to stand 5 minutes 

 and decant the supernatant liquid into a second beaker. Refill the first with water 

 and again mix the contents. After 5 minutes more decant the second beaker into 

 a third, the first into the second, refill and again mix the first. Continue this opera- 

 tion, decanting from the third beaker into the sink until the lighter material is 

 washed out from the ketchup. Then collect the sand from the 3 beakers on a tared 

 Gooch crucible, dry, ignite and weigh. Attention is especially called to the fact 

 that under "Sand" only the figure obtained by this method should be reported. 

 The results obtained by the determination of ash insoluble in hydrochloric acid 

 are not applicable to the determination of sand, since the sand is so unevenly dis- 

 tributed that reliable results can only be obtained by taking a larger sample than 

 is possible in the determination of ash. 



39 ASH.-OFFICIAL. 



Evaporate 10 grams of the sample to dryness on a water bath and ignite as directed 

 under VIII, 4. 



40 ALKALINITY OF THE ASH.— TENTATIVE. 



Proceed as directed under XIII, 7. Express the result as the number of cc. of 

 N/10 acid required to neutralize the ash from 100 grams of the sample. 



41 SODIUM CHLORID.— OFFICIAL. 



Proceed as directed under III, 15, using either an aliquot of the solution obtained 

 in 40 or a nitric acid solution of the whole ash. 



42 REDUCING SUGARS BEFORE INVERSION.-TENTATIVE. 



Weigh 20 grams of the sample into a 200 cc. flask, dilute with about 100 cc. of 

 water, clarify with a slight excess of neutral lead acetate solution, dilute to the 

 mark and filter. Remove the excess of lead with anhydrous sodium or potassium 

 oxalate. Filter and determine reducing sugars as directed under Vlll, 25. Ex- 

 press the result as per cent of invert sugar. 



