Elementary Chemical Microscopy
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In our eReader you can find the full English version of the book. Read Elementary Chemical Microscopy Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Elementary Chemical Microscopy
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Chem. Soc, 21 (1899), 659.
204 ELEMENTARY CHEMICAL MICROSCOPY as starches, flour, meals, spices, etc. , powdered sucrose, dextrose, lactose or soluble dextrin are most useful as diluents.
When the mixtures under examination are of a density only very slightly greater than water and are insoluble therein, and therefore if suspended would subside only after a long period, it is possible to weigh out a portion of the mixture, add it to water, or better, water and glycerine, in a small graduated fl...ask, fill to the mark, shake well and quickly remove one cubic centimeter or less, for counting. This method avoids the error arising from non-uniform quantities, but is longer and more cumbersome than the methods already described.
To further guard against the rapid subsidence of the particles in suspension, gums, dextrin, gelatine or mucilage may be added to the glycerine- water mixture; in most cases this will be found to be a decided improvement. 1 When the removal of fats in no way alters the morphology nor the dimensions of the elements of the powdered material it will generally be found to be an advantage to extract the sample with ether or petroleum ether after drying and weighing.
What to read after Elementary Chemical Microscopy?
You can find similar books in the "Read Also" column, or choose other free books by Emile Monnin Chamot to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Chem. Soc, 21 (1899), 659.
204 ELEMENTARY CHEMICAL MICROSCOPY as starches, flour, meals, spices, etc. , powdered sucrose, dextrose, lactose or soluble dextrin are most useful as diluents.
When the mixtures under examination are of a density only very slightly greater than water and are insoluble therein, and therefore if suspended would subside only after a long period, it is possible to weigh out a portion of the mixture, add it to water, or better, water and glycerine, in a small graduated fl...ask, fill to the mark, shake well and quickly remove one cubic centimeter or less, for counting. This method avoids the error arising from non-uniform quantities, but is longer and more cumbersome than the methods already described.
To further guard against the rapid subsidence of the particles in suspension, gums, dextrin, gelatine or mucilage may be added to the glycerine- water mixture; in most cases this will be found to be a decided improvement. 1 When the removal of fats in no way alters the morphology nor the dimensions of the elements of the powdered material it will generally be found to be an advantage to extract the sample with ether or petroleum ether after drying and weighing.
What to read after Elementary Chemical Microscopy?
You can find similar books in the "Read Also" column, or choose other free books by Emile Monnin Chamot to read onlineMoreLess
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