Assertion: phosphoric acid's amount | /r/HasProperty | 0.4%
Facets:
value: by comparison
type: OTHER
Source sentences:
text: By comparison, the amount of organic impurities in the phosphoric acid before the filtration was 0.4%, When the obtained phosphoric acid was treated in the same manner as in Example 2, there was obtained sodium silicofiuoride of a purity of 99.8%.