Table 5 gives a comparison of the results obtained by the two methods.
TABLE 5.—COMPARISON OF RESULTS BY METHODS 1 AND 2
| Method 1 | Method 2 | |
| Research Council Spec. | 16.31 | 18.85 |
| Merck & Co. | 4.56 | 3.92 |
| Heyden Chemical Works | 0.68 | 0.97 |
The results obtained in Method 1 (the percolation method) apparently are reliable and, as the method is the more simple, may be given preference.
COMBINED TRIBROMPHENOL (TRIBROMPHENATE)
The amount of tribromphenol existing in the specimen in combination was calculated by subtracting from the per cent. of total tribromphenol determined, the per cent. of free tribromphenol found by Method 1.
The figures obtained are given in Table 6.
TABLE 6.—THE TRIBROMPHENATE CONTENT OF BISMUTH TRIBROMPHENATE
| Per Cent. of Combined Tribromphenol | |
| Research Council Specimen | 43.13 |
| Merck & Co. | 53.19 |
| Heyden Chemical Works | 20.36 |