Читать книгу Foods and Their Adulteration - Harvey Washington Wiley - Страница 65
Composition of Parboiling Water.
Оглавление—The liquor, after parboiling the above sample, weighed 280 pounds and had the following composition:
| Water, | 99.12 | percent |
| Protein, | .06 | „ |
| Meat bases, | .25 | „ |
| Ash, | .25 | „ |
| Salt, | .05 | „ |
The above data show that the general effect of parboiling upon the canned meat is to diminish its content of water. Only a small quantity of the soluble proteids is found in the liquor, and the other principal constituents removed, aside from water, are the meat bases and mineral content or ash. The fat in the soup liquor was not determined because it rises to the surface and is not in any sense a constituent of the liquor itself. Considerable quantities of fat were removed in parboiling, the amount depending largely upon the temperature. At a low temperature of parboiling, such as described, the amount of fat secured is far less than when the temperature of parboiling is higher.
Table Showing the Comparative Effect of Parboiling and Sterilizing upon the Fresh Beef.
| Constituents. | Fresh Beef. | Extracted by Boiling. | Added in Canning. | Composition of Canned Beef as Determined by Analysis. |
|---|---|---|---|---|
| Lbs. | Lbs. | Lbs. | Lbs. | |
| Water, | 254.8 | 122.1 | 14.1 | 146.8 |
| Protein, | 59.3 | .1 | .1 | 58.5 |
| Meat bases, | 3.9 | .7 | .0 | 2.7 |
| Fat, | 35.4 | 12.2 | .... | 23.2 |
| Ash, | 3.4 | .7 | .2 | 2.1 |
| Salt, | .1 | .1 | .2 | .4 |
| Undetermined, | 1.2 | .... | .... | 1.7 |
| Total, | 358.1 | .... | .... | 235.4 |
