 | United States. National Advisory Committee for Aeronautics - Aeronautics - 1917 - 650 pages
...making extractions with acetone, is as follows : Place a 2-gram sample in an acetone-extracted S. & S. paper thimble and extract continuously with acetone for eight hours, unless the TIME IN TO WEATHER solution in the thimble is still colored at the end of that time, when the extraction... | |
 | United States. National Advisory Committee for Aeronautics - Aeronautics - 1918 - 660 pages
...making extractions with acetone, is as follows : Place a 2-gram sample in an acetone-extracted S. & S. paper thimble and extract continuously with acetone...benzene for dissolving any material which may have separated from the solvent during the course of the extraction. Drive off the solvents at as low a... | |
 | Analytical chemistry - 1927 - 1020 pages
...cup, which is suspended in a weighed extraction flask. Extract the sample continuously for 8 hrs., unless the solution in the thimble is still colored...end of that time, when the extraction shall proceed for a further period of 4 hrs. or longer. For hard rubber the extraction period shall be a minimum... | |
 | American Society for Testing Materials - Building materials - 1928 - 976 pages
...extraction cup, which is suspended in a weighed extraction flask. Extract the sample continuously for 16 hours, unless the solution in the thimble is still...end of that time, when the extraction shall proceed for a further period of 4 hours or longer. Carefully note all characteristics of the acetone extract,... | |
 | Weights and measures - 1912 - 726 pages
...extraction cup, which is suspended in a weighed assay flask. (See Fig. 47.) Extract the sample continuously for eight hours unless the solution in the thimble is still colored at the end of that time, 102 the when the extraction shall proceed for a further period of four hours or longer. Carefully note... | |
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Extract the sample continuously for 16 hours, unless the solution in the thimble is still colored at the end of that time, when the extraction shall proceed for a further period of 4 hours or longer. 