 | United States. National Bureau of Standards - 1942 - 840 pages
...portion add hydrochloric acid and invert by one of the methods described on page 153. Cool and make to volume at the temperature at which the observations are to be made. Polarize. Correct both rotations to the normal weight of sample. Calculate the percentage of sucrose... | |
 | Noël Deerr - 1921 - 806 pages
...one portion 15 cc of the ammonium chloride solution or 3-392 grams of dry ammonium chloride. Complete to volume at the temperature at which the observations are to be made ; filter, if necessary, and polarize. For the invert polarization as follows : Pipette 50 cc into a 100 cc 20 flask,... | |
 | United States. National Bureau of Standards - 1921 - 944 pages
...solution add the precisely determined volume of ammonia required exactly to neutralize the acid. Make to volume at the temperature at which the observations are to be made. Polarize. Convert both readings to those of the normal solution by multiplying by the factor Volume... | |
 | United States. Bureau of Customs - 1932 - 996 pages
...three minutes and allow it to remain in the bath for a total time of 10 minutes. Cool quickly and make to volume at the temperature at which the observations are to be made. Shake and filter as rapidly as possible. Polarize. All polarizations shall be made in water-jacketed... | |
| |
Defecate, if necessary, with basic lead acetate in the usual manner, making to volume at the temperature at which the observations are to be made. 