This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1885 Excerpt: ...settled, the liquid is poured off and the dextrin estimated in the residue by direct weighing, or deduced from the solution-density or optical activity of the redissolved residue. c. The gallisin may be estimated by distilling the alcoholic solution obtained in b, fermenting an aliquot part of the residual liquid, and ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1885 Excerpt: ...settled, the liquid is poured off and the dextrin estimated in the residue by direct weighing, or deduced from the solution-density or optical activity of the redissolved residue. c. The gallisin may be estimated by distilling the alcoholic solution obtained in b, fermenting an aliquot part of the residual liquid, and treating the filtered solution left after complete fermentation by Fehlings solution. d. The rotation due to the sum of the optically active bodies present is ascertained on the clarified solution at 15 C. e. The Icevulose is estimated from the change in the rotatory power of the solution on heating, as described in par. 671. /. The sucrose is estimated from the change produced in the rotatory power of the solution by treatment with invertin (par. 563). The result is confirmed by the change in the cuprie oxide reducing power of the solution caused by the action of the invertin. g. The cuprie oxide reducing power of the original solution is determined gravimetrically by Fehlings solution. From the value for K thus obtained that due to any gallisin found after fermentation is deducted, and from the remainder is subtracted the reduction due to any laevulose present. The difference is the reducing power due to the dextrose and maltose. The sum of their weights having been ascertained by deducting the lasvulose, sucrose, dextrin, gallisin, and ash from the total solids, the amounts of maltose may be calculated by subtracting the value of K for the two bodies from the sum of the percentages of the two, and dividing the difference by Ct38.1 The maltose thus found is subtracted from the sum when the percentage of dextrose will be arrived at. Further information on the estimation of dextrose and maltose in admixture is given in the section on "Com...
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Add this copy of Commercial Organic Anaylsis to cart. $67.74, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Hialeah, FL, UNITED STATES, published 2016 by Palala Press.
